问题 选择题

下列对一些事实的解释中,不合理的是(  )

序号现象解释
A室内摆放鲜花,满屋飘香

 

分子不断地运动
B加压条件下,石油气液化后体积变小加压的条件下,分子的体积都变小

 

C水受热变成水蒸汽分子间间隔变大

 

D盐酸、稀硫酸都能使紫色石蕊变红盐酸盐酸、稀H2SO4 中都含有大量的H+

 

A.A

B.B

C.C

D.D

答案

A、室内摆放鲜花,满屋飘香,是因为花香中含有的分子是在不断的运动的,向四周扩散,使人们闻到花香,故选项解释正确.

B、加压条件下,石油气液化后体积变小,石油气分子之间有一定的间隔,气体受压后,分子间隔变小,气体的体积减小,而不是分子的体积减小,故选项解释错误.

C、水受热变成水蒸汽,是因为温度升高,分子间的间隔增大,故选项解释正确.

D、盐酸、稀硫酸都能使紫色石蕊变红,是因为盐酸、稀H2SO4 中都含有大量的H+,故选项解释正确.

故选B.

单项选择题

Letter A

Dear Rose,

I like your programmes very much. I’m now writing to ask you something about American social customs. My American friends want me to join them in their dinner party. I am very happy and have decided to go, but I’m a little worried about it, too. The social customs in my country are very different from here, so I’m afraid of making mistakes.

Should I bring a present, such as sweets or flowers Should I arrive on time or a little late At the dinner table, how can I know which fork or knife to use How can I let the family know that I’m thankful for their kindness

Wang Lin

Letter B

Dear Wang Lin,

It’s a good idea to bring a small present when you go to a dinner party. Flowers are always nice, or you may bring a bottle of wine if you know that your friends drink it.

You should arrive on time or five to ten minutes late. Don’t get there early. If you’re going to be more than fifteen minutes late, you should call and tell them.

Try to be free at the dinner table. If you don’t know about choosing the right fork or knife, just watch the other people, and follow them. If you still have no idea of what to do, ask the person next to you.

If you like the food, say so. Of course, you’ll thank them for the meal and for their kindness. It’s also a good idea to send a thank you card the day after.

Rose

Which of the following is NOT proper for joining in a dinner party().

A.Get there 15 minutes earlier.

B.Make yourself at home.

C.Follow others to use forks and knives.

D.Thank your friends for the meal.

单项选择题

After winning a big game, athletes are often asked how they feel. Usually athletes say how (1) it is to win this big game. On the contrary, the fact is that losing a big game, or in my case, all the games, can be even harder.

From the spectators’ point of view, last year’s basketball (2) for my high school team was nothing (3) of an embarrassment. And (4) 0 and 20 is certainly nothing to be proud of, that season had a bigger impact on me than any other. As a team captain, I knew it probably wouldn’t be the (5) year, but did I ever think we would lose every game Of course not. Since six of our top players had graduated, it was clear that we were a (n) (6) team who would struggle. The struggle began earlier than expected, (7) , as our team center was suspended (禁赛) for the season, and two key members decided to (8) for some reason. At this point, dropping out probably passed through every player’s mind, but in the end, we all stuck if out, (9) to work still harder.

Then there came a time when even our (10) and given up on us. Personally, I felt like it was (11) worthwhile giving my all. I thought, if even the coach doesn’t believe in us, why should I But just as my hope began to (12) , a teammate called a meeting. He said," Nobody thinks we are going to win, but, as teammates and friends, we (13) it to each other to go all out every game. "

It was that moment that (14) me how to be a leader. It hit me that I certainly didn’t (15) the role. As a leader you can never quit (16) the team who looks up to you. It is one (17) to be named captain, feel great and go through the motions, but it is quite another to be a real captain and make sure everyone realizes their full (18) all the time.

I am sure it is great to go through without losing and bringing home awards. But in all honesty, I (19) the fact that my team lost every game last year. It may not help me to become a better basketball player, but it already has made me a better leader, and (20)

6().

A.unique

B.adventurous

C.young

D.untrained