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问题 多选题

如图所示为卢瑟福发现质子的实验装置。M是显微镜，S是荧光屏，窗口F处装有银箔，氮气从阀门T充入，A是放射源．下列说法中正确的是

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A.该实验的核反应方程为：＋147N→＋

B.充入氮气前，调整银箔厚度，使S上见不到α粒子引起的闪烁

C.充入氮气前，调整银箔厚度，使S上能见到质子引起的闪烁

D.充入氮气后，调整银箔厚度，使S上见不到质子引起的闪烁

答案

AB

选择题

如图为植物组织培养过程，有关说法不正确的是

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A．B试管中细胞全能性最高

B．D试管中培育出的个体都是纯合子

C．A→B的过程不需要光照

D．A→D的细胞分裂都是有丝分裂
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补全对话，情景问答
从方框中选出适当的句子补全对话，有两项是多余的。
Jane: Excuse me!     1    
Jack: Sure! What question?
Jane: What would you do if you wanted to be friends with a new student?
Jack: I'd wait for her to introduce herself to me.     2     
Jane: Because it could tell me your personality.
Jack: Well, what do you think I'm like?
Jane: You are probably a shy person.
Jack:     3   _ I don't like talking to a group.
Jane :     4  _ But your friends say you are a good listener.
Jack: Absolutely! I like listening to others. How about you? Are you shy, too?
Jane: I'm afraid not.     5    I have lots of friends and I enjoy the company of other people.
Jack: I think so.
A. May I ask you a question?
B. Why do you ask me this question?
C. Maybe you are right.
D. I think I'm outgoing and fairly confident.
E. That's why you don't want to introduce yourself first.
F. I don't think so.
G. Maybe that's a good idea.
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