2.对于化学反应方向的确定,下列说法正确的是
A.温度、压力一定时,放热的、熵减小的反应一定能自发进行
B.温度、压力一定时,焓因素和熵因素共同决定一个化学反应的方向
C.反应焓变是决定反应能否进行的唯一因素
D.固体的溶解过程与熵变无关
1.下列关于能量转换的认识中不正确的是
A.电解水生成氢气和氧气时,电能转化成化学能
B.煤燃烧时化学能主要转变成热能
C.绿色植物光合作用过程中光能转变成化学能
D.白炽灯工作时电能转变化学能
13、----My family usually goes skating for vacation.I like skating,but I want to try something different this year.
----
A、Let’s go. B、Cheer up. C、Like what? D、Take care.
1-----5CDACD 6-----10BCDCD 11----13CCC
12、----Why didn’t you turn up at the meeting?
----I for a long-distance call from my cousin in England.
A、waited B、had waited C、was waiting D、have been waiting
11、----You couldn’t have chosen any gift better for me.
----
A、Oh,don’t you like it? B、That’s all right.
C、I’m glad you like it so much. D、You have a gift for music,don’t you?
10、----Hello,Mr.Smith.This is Larry Jackson.I am afraid I won’t be able to arrive on time for the meeting in your office.
---- .We’ll wait for you.
A、Hurry up B、No doubt C、Cheer up D、That’s all right
9、---- John come here tonight?
----I’m not sure,but he stay at home.
A、Can;must B、Must;might C、Can;might D、May;might
8、----Would you mind if I turn the radio a little up?
---- .
A、Of course,I do B、Yes,you may C、Sure,go ahead D、No,go ahead
7、----Would you agree with what I said just now?
----
A、Who cares? B、Never. C、You took the words right out of my mouth.
D、I don’t know whether it’ll work or not.
6、----People should stop using their cars and start using public transport.
---- .The roads are too crowded as it is.
A、All right B、Exactly C、Go ahead D、Fine
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