（山东省潍坊市课改实验区）如图所示把正在发声的闹钟放在玻璃罩内，闹钟和罩的底座之间垫上柔软的泡沫塑料，逐渐抽出罩内的空气，闹钟的声音会逐渐变小，直至听不到声音，这个实验说明了
 
A. 声音是由物体振动产生的     B. 声音必须通过介质才能传播
C. 声波在玻璃罩中发生了反射    D. 声波在传播过程中能量逐渐减少

（山东省潍坊市课改实验区）如图所示把正在发声的闹钟放在玻璃罩内，闹钟和罩的底座之间垫上柔软的泡沫塑料，逐渐抽出罩内的空气，闹钟的声音会逐渐变小，直至听不到声音，这个实验说明了
 
A. 声音是由物体振动产生的     B. 声音必须通过介质才能传播
C. 声波在玻璃罩中发生了反射    D. 声波在传播过程中能量逐渐减少

The summer sun is out, and we're beginning to feel the heat. Before you go outside to have fun, make sure you put on the right things!

Do you know what kind of clothes can make you look hot and keep you cool? Here are some ideas for clothes to help you look great.

Fun colors and cartoons are back from the 1980s this year; the dirty look is out. People will be looking for fresh bright colors this summer. Girls in pink look cute and sweet. And green makes everyone look more lively. Some of the best colours are cotton candy pink and lime green. These soft colours go well with jeans or just about anything else. As soon as you put on one of these colours, you'll feel like a star!

Some girls like something more interesting than all solid(单一的) colours. For them, there are lots of floral patterns (花卉图案) to choose from in shirts, dresses or skirts. A floral shirt looks nice with a light-coloured solid skirt or trousers.

Of course, jeans are in for boys. If you get too hot, try something lighter, like khaki cargo pants. They'll have enough pockets to keep everything you need for studying, playing and keeping cool! Army green is all the rage(盛行) this year.

1.This passage mainly tells us ____.

A．what colour to choose for summer clothes	B．how to make summer clothes
C．right colours for boys	D．how to hold a fashion show

2.The underlined word “in” probably means ____.

A．“在里面”

B．“流行的”

C．“参加”

D．“喜欢”

3.Which of the following statements is true according to the passage?

A．Colours, like red and green, look good with jeans.

B．A floral shirt goes well with a light-coloured solid skirt.

C．Light colours make people feel hot.

D．Army green is out this year.

4.Khaki cargo pants are special because they ____.

A．go well with floral patterns in shirts

B．make people want to dance

C．have enough pockets

D．are cheap

5.Which of the following colours may not look good in summer according to the passage? 

A．orange

B．pink

C．army green

D．black

 

(3分) 蛋白质是由多种氨基酸构成的极为复杂的化合物。丙氨酸是众多氨基酸中的一种，其化学式为，丙氨酸的组成元素有_______种，一个丙氨酸分子中共有________个原子。相对分子量       

The summer sun is out, and we're beginning to feel the heat. Before you go outside to have fun, make sure you put on the right things!
Do you know what kind of clothes can make you look hot and keep you cool? Here are some ideas for clothes to help you look great.
Fun colors and cartoons are back from the 1980s this year; the dirty look is out. People will be looking for fresh bright colors this summer. Girls in pink look cute and sweet. And green makes everyone look more lively. Some of the best colours are cotton candy pink and lime green. These soft colours go well with jeans or just about anything else. As soon as you put on one of these colours, you'll feel like a star!
Some girls like something more interesting than all solid(单一的) colours. For them, there are lots of floral patterns (花卉图案) to choose from in shirts, dresses or skirts. A floral shirt looks nice with a light-coloured solid skirt or trousers.
Of course, jeans are in for boys. If you get too hot, try something lighter, like khaki cargo pants. They'll have enough pockets to keep everything you need for studying, playing and keeping cool! Army green is all the rage(盛行) this year.
【小题1】This passage mainly tells us ____.

A．what colour to choose for summer clothes	B．how to make summer clothes
C．right colours for boys	D．how to hold a fashion show

【小题2】The underlined word “in” probably means ____.

A．“在里面”

B．“流行的”

C．“参加”

D．“喜欢”

【小题3】Which of the following statements is true according to the passage?

A．Colours, like red and green, look good with jeans.

B．A floral shirt goes well with a light-coloured solid skirt.

C．Light colours make people feel hot.

D．Army green is out this year.

【小题4】Khaki cargo pants are special because they ____.

A．go well with floral patterns in shirts

B．make people want to dance

C．have enough pockets

D．are cheap

【小题5】Which of the following colours may not look good in summer according to the passage? 

A．orange

B．pink

C．army green

D．black