问题
选择题
下列有关分子和原子的说法中，正确的是[ ]
A．原子是由质子和中子构成的
B．分子和原子都可以构成物质
C．分子的质量总比原子的质量大
D．分子在不断运动，原子静止不动
答案
答案：B
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下列有关分子和原子的说法中，正确的是[ ]
A．原子是由质子和中子构成的
B．分子和原子都可以构成物质
C．分子的质量总比原子的质量大
D．分子在不断运动，原子静止不动
答案：B
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| Yesterday was my friend Kyra's birthday. He invited me to his birthday party. Another friend, Guy, had offered to take me to the party by car. Well, I was getting dressed 1 Guy rang and said he was ill, so I decided to go by train. Unluckily, while I was talking 2 the phone, the cat walked over my clean shirt, so I had to spend a few minutes finding another one and I was 3 for leaving. As I was walking to the station it started snowing and I got very cold. I just 4 a train and I had to wait at the station for half an hour. When the train finally arrived I was frozen ! I was so cold and tired that during the joumey I 5 and I missed my station. Well, I got off at the next stop and decided to walk 6 to Kyra's. I walked for half an hour and then I realized (意识到) I was 7 . Luckily I found a 8 and telephoned for a taxi. When I finally arrived at Kyra's house it was 9 midnight and people were going home. What a 10 evening! | ||||
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