without doing 没做-——青夏教育精英家教网—

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Laboratory　work　is　your　chance　to　learn　science　firsthand.　It　can　be　fun　but　you　must　be　careful　to　prevent　injury.　Listen　closely　when　your　teacher　reads　and　explains　the　rules　before　your　first　lab　lesson.
LABORATORYRULES
Throughout　the　lesson
·Do　not　enter　the　science　lab　without　the　teacher’s　permission.·No　food　or　drinks　are　to　be　alowed　in　the　science　lab.
Before　the　Experiment
·Read　al　instructions　carefuly　before　every　experiment.
·Prepare　al　apparatus（仪器）and　arrange　them　so　that　you　wil　not　knock　them　over　while　doing　the　experiment.
During　the　Experiment
·If　you　are　unsure　of　how　to　use　any　apparatus　or　how　to　operate,　ask　your　teacher　for　help.·Never　smel　or　taste　chemicals　unless　your　teacher　gives　permission.
After　the　Experiment
·Wash　al　apparatus　after　use　and　return　them　to　the　places　where　they　were.
·Throw　waste　materials　in　proper　waste　baskets.　　　　First　Aid　　　　
·Report　al　accidents　to　your　teacher　immediately.
·If　you　spil（溅出）any　chemicals　onto　your　body　or　clothing,　wash　with　plenty　of　water　and　report　to　your　teacher.
【小题1】　Your　teacher　wil　probably　tel　you　the　rules　above　_____　the　first　lab　lesson.

A．before

B．since

C．during

D．after

【小题2】　Before　every　experiment,　you　should　_____.

A．taste　the　chemicals　first

B．clean　al　the　apparatus

C．read　al　instructions　carefuly

D．report　al　the　accident

s　to　the　teacher

【小题3】　When　you　are　not　sure　how　to　use　al　apparatus,　_____.
A.　try　them　on　your　own
B.　read　the　rules　carefuly
C.　ask　your　teacher　for　help
d.　put　them　back
【小题4】　It　i

s　clear　that　you　can　_____.

A．bring　food　into　the　lab
B．enter　the　lab　anytime
C．smel　chemicals　as　you　like	D．learn　science　directly　in　the　lab

【小题5】　If　you　get　chemicals　on　the　clothing,　you　can　find　ways　to　solve　it　in　the　part　_____.

A．Before　the　Experiment

B．First　Aid

C．During　t

he　Experiment

D．After　the　Experiment

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Laboratory　work　is　your　chance　to　learn　science　firsthand.　It　can　be　fun　but　you　must　be　careful　to　prevent　injury.　Listen　closely　when　your　teacher　reads　and　explains　the　rules　before　your　first　lab　lesson.

LABORATORYRULES

Throughout　the　lesson

·Do　not　enter　the　science　lab　without　the　teacher’s　permission.·No　food　or　drinks　are　to　be　alowed　in　the　science　lab.

Before　the　Experiment

·Read　al　instructions　carefuly　before　every　experiment.

·Prepare　al　apparatus（仪器）and　arrange　them　so　that　you　wil　not　knock　them　over　while　doing　the　experiment.

During　the　Experiment

·If　you　are　unsure　of　how　to　use　any　apparatus　or　how　to　operate,　ask　your　teacher　for　help.·Never　smel　or　taste　chemicals　unless　your　teacher　gives　permission.

After　the　Experiment

·Wash　al　apparatus　after　use　and　return　them　to　the　places　where　they　were.

·Throw　waste　materials　in　proper　waste　baskets.　　　　First　Aid　　　　

·Report　al　accidents　to　your　teacher　immediately.

·If　you　spil（溅出）any　chemicals　onto　your　body　or　clothing,　wash　with　plenty　of　water　and　report　to　your　teacher.

1.　Your　teacher　wil　probably　tel　you　the　rules　above　_____　the　first　lab　lesson.

A.　before　　　　　B.　since　　　　C.　during　　　　D.　after

2.　Before　every　experiment,　you　should　_____.

A.　taste　the　chemicals　first

B.　clean　al　the　apparatus

C.　read　al　instructions　carefuly

D.　report　al　the　accidents　to　the　teacher

3.　When　you　are　not　sure　how　to　use　al　apparatus,　_____.

A.　try　them　on　your　own

B.　read　the　rules　carefuly

C.　ask　your　teacher　for　help

d.　put　them　back

4.　It　is　clear　that　you　can　_____.

A.　 bring　food　into　the　lab

B.　enter　the　lab　anytime

C.　smel　chemicals　as　you　like

D.　learn　science　directly　in　the　lab

5.　If　you　get　chemicals　on　the　clothing,　you　can　find　ways　to　solve　it　in　the　part　_____.

A.　Before　the　Experiment

B.　First　Aid

C.　During　the　Experiment

D.　After　the　Experiment

查看答案和解析>>

Laboratory　work　is　your　chance　to　learn　science　firsthand.　It　can　be　fun　but　you　must　be　careful　to　prevent　injury.　Listen　closely　when　your　teacher　reads　and　explains　the　rules　before　your　first　lab　lesson.
LABORATORYRULES
Throughout　the　lesson
·Do　not　enter　the　science　lab　without　the　teacher’s　permission.·No　food　or　drinks　are　to　be　alowed　in　the　science　lab.
Before　the　Experiment
·Read　al　instructions　carefuly　before　every　experiment.
·Prepare　al　apparatus（仪器）and　arrange　them　so　that　you　wil　not　knock　them　over　while　doing　the　experiment.
During　the　Experiment
·If　you　are　unsure　of　how　to　use　any　apparatus　or　how　to　operate,　ask　your　teacher　for　help.·Never　smel　or　taste　chemicals　unless　your　teacher　gives　permission.
After　the　Experiment
·Wash　al　apparatus　after　use　and　return　them　to　the　places　where　they　were.
·Throw　waste　materials　in　proper　waste　baskets.　　　　First　Aid　　　　
·Report　al　accidents　to　your　teacher　immediately.
·If　you　spil（溅出）any　chemicals　onto　your　body　or　clothing,　wash　with　plenty　of　water　and　report　to　your　teacher.
【小题1】　Your　teacher　wil　probably　tel　you　the　rules　above　_____　the　first　lab　lesson.

A．before

B．since

C．during

D．after

【小题2】　Before　every　experiment,　you　should　_____.

A．taste　the　chemicals　first

B．clean　al　the　apparatus

C．read　al　instructions　carefuly

D．report　al　the　accidents　to　the　teacher

【小题3】　When　you　are　not　sure　how　to　use　al　apparatus,　_____.
A.　try　them　on　your　own
B.　read　the　rules　carefuly
C.　ask　your　teacher　for　help
d.　put　them　back
【小题4】　It　is　clear　that　you　can　_____.

A．bring　food　into　the　lab
B．enter　the　lab　anytime
C．smel　chemicals　as　you　like	D．learn　science　directly　in　the　lab

【小题5】　If　you　get　chemicals　on　the　clothing,　you　can　find　ways　to　solve　it　in　the　part　_____.

A．Before　the　Experiment

B．First　Aid

C．During　the　Experiment

D．After　the　Experiment

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　　For a certain sport, a team of three players is to be chosen from a group of eight players, according to the following conditions:

　　(1)If neither A nor B plays, then C must play.

　　(2)B refuses to play with H.

　　(3)If C plays, then D does not play.

　　(4)If E plays, then F must also play .

　　(5)If G does not play, then H and either A or B must play.

1．Three players will be chosen from ________ players.

[　　]

A．only five

B．more than eight

C．four plus four

D．seven

2．Which of the following may be concluded from the conditions given?

[　　]

A．If A and B do not play, D does not play.

B．If G plays, H does not play.

C．If either A or B plays, then C does not play.

D．If E does not play, then F does not play.

3．On how many different teams may E play?

[　　]

A．0

B．1

C．2

D．3

4．Which of the following teams may be chosen without doing anything against any of the conditions given?

Ⅰ．ACG

Ⅱ．CFG

Ⅲ．BDE

[　　]

A．Ⅰonly

B．Ⅲonly

C．ⅠandⅡonly

D．ⅡandⅢonly

5．If both F and G are ill and unable to play, how many different teams may be chosen?

[　　]

A．0

B．1

C．2

D．3

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请先阅读下面短文，掌握其大意，然后根据短文内容从下面方框内的七个选项中，选择五个还原到文中，使短文意思通顺、结构完整。

　　Hi Grace,

　　How's it going? Sorry I haven't emailed for a while, but I had so much to do!

　　I had told you about my decision to take up a sport．I knew I wasn't fit and I wanted to get some exercise．But that wasn't the only reason that I decided to do a sport．Students who play sports do better at school．　　1　　 Exercise also helps learning and memory(记忆)．

　　　　2　　 First, I tried soccer．I had played a bit of soccer before and I thought it wouldn't be too bad．I knew I couldn't nm for very long without feeling tired．On the first day, I was able to nm for the first ten minutes, but then I was so tired that I couldn't even kick the ball!

　　Then, I tried volleyball．　　3　　 I was able to nm for the first twenty minutes and I wasn't the slowest runner in the team! After a few weeks．I could run faster and longer．I was doing better and feeling better．　　4　　 Maybe I'm not a team sport person after all!

　　Finally, I tried kung fu．It's a great sport that exercises the body and the mind．You learn to follow instructions carefully and do what you are asked to do．This is the fight sport for me! 　　5　　 I feel so confident that l even showed some moves to the class last week! Can you believe it?

　　I hope you're OK! Write and let me know what you've been doing!

　　Bye for now!

Kristie

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