7. Where did the two speakers go yesterday evening?
A. They went to the theatre. B. They went to the cinema. C.They went to the hospital.
6. What did the woman suggest?
A. She suggested the man ask his teachers to borrower the books.
B. She suggested the man read the books there. C. She suggested the man copy the book.
5. How many books did the man finally take away?
A. Four. B.Three. C. One.
4. What is the boy doing?
A. Watching TV. B.Listening to music. C.Watching the video
3. When does the coversation take place?
A. In the morning. B. In the afternoon. C. In the evening.
2. Where are the two speakers?
A. At a garage. B. At a bus shop. C. At a restaurant.
1. Why is the woman late?
A. She missed the bus. B. She couldn’t start her car. C. She couldn’t find the key.
5.某原子的核内质子数为18,中子数比电子数多4,则该原子中所含粒子(质子、中子、电子)总数为( )
A.18 B.40 C.58 D.62
生活小语
上帝从不埋怨人们的愚昧,人们却埋怨上帝的不公平
4.原子的相对质量( )
A.就是原子的质量 B.在数值上约等于质子数与中子数之和
C.可以用千克或克作单位 D.是一个质量比,没有单位
3.(07河北中考)朝核问题引发了国际关注,核问题的关键是核能的如何利用。已知某种核原料的原子核内含有1个质子和2个中子,则下列有关说法正确的是( )
A.该原子是一种氢原子 B.该元素是金属元素
C.该原子核外有3个电子 D.该原子核带2个单位的正电荷
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