甲分子与乙分子反应生成丙分子的示意图如下，下列说法中，不正确的是( )
A．物质甲是单质
B．丙分子中A、B原子个数比为3∶1
C．反应前后原子的个数没有改变，分子的个数也没有改变
D．根据质量守恒定律可推知，乙的化学式为A2
Mr Brown saw a sweater in a shop window. It wa
s very cheap, so he bought it. When he got home, he put it on. It was all right and he was pleased with it.
In the afternoon, he went to work in his garden. It soon began to rain and Mr Brown had to run into the house. He ran quickly, but he still got wet. Then his sweater started to shrink(收缩)! It got smaller and smaller. Mr Brown tried to take it off, but he couldn't.
In the end, with the help of his wife, he got out of the sweater. Mrs Brown laughed, "You see, you bought a cheap thing, but…"
Mr Brown saw a nicein a shop window. And he bought it.
| A． | jacket | B． | coat | C． | sweater | D． | shirt |
When he, he put it on.
| 1． |
Mr Brown got wet and he tried tothe sweater.
From the story, we know Mr Brown bought.
|
请阅读下面短文，选择最佳答案，将其标号在答题卡上涂黑。
Smiling is the best way of making friends.
When I was thirteen 46 old, my father found a job in the city. So my family moved there. I also came to a 47 school near where we live. My old school was far away. At first, I did not know anyone in my class. I was very lonely 48 I was afraid to make friends with my classmates. I 49 talk to anyone about my problem, and I didn't want my parents to 50 me.
Then one day, something good happened. I was sitting at my desk 51 as usual while my classmates were talking happily with each other. At that moment, 52 came into the classroom. I didn't know who he was. He passed me and then turned back. He looked 53 me and, without a word, smiled. Suddenly, I felt happy, lively and warm. That smile changed my life. I started to talk with the other classmates and made friends. Day by day, I became 54 to everyone in my class.
55 the smile, I have moved on to a new life. Now, I believe that the world is what you think it is. So smile at the world and it will smile back.
| 1 | |||
| A．days | B．weeks | C．months | D．years |
| 2 | |||
| A．old | B．new | C．same | D．easy |
| 3 | |||
| A．because | B．before | C．after | D．if |
| 4 | |||
| A．couldn't | B．mustn't | C．needn't | D．won't |
| 5 | |||
| A．talk to | B．look after | C．worry about | D．ask for |
| 6 | |||
| A．early | B．unhappily | C．quickly | D．wonderfully |
| 7 | |||
| A．a girl | B．a boy | C．some girls | D．some boys |
| 8 | |||
| A．of | B．on | C．at | D．into |
| 9 | |||
| A．closer | B．older | C．cooler | D．colder |
| 10 | |||
| A．Instead of | B．Look forward to | C．Pay attention to | D．Thanks to |
This is my beautiful school is near the famous library.
| A． | where | B． | which | C． | who | D． | when |
--- Can you tell me ______ on the Internet? --- OK, mum.
| A． | how can I use QQ | B． | where can I use QQ |
| C． | how I can use QQ | D． | whether can I use QQ |
Thousands of houses _______ by the floods in Guangxi last month.
| A． | destroy | B． | destroyed | C． | have destroyed | D． | were destroyed |