问题
单项选择题
用中子轰击铀核时出现原子核的裂变,并放出新的()现象,称核裂变反应
A.质子
B.轻子
C.中子
D.原子
答案
参考答案:C
用中子轰击铀核时出现原子核的裂变,并放出新的()现象,称核裂变反应
A.质子
B.轻子
C.中子
D.原子
参考答案:C
第二节:根据对话内容,从对话后的选项中选出能填入空白出的最佳选项。选项中有两项为多余选项。 ----Lovely day, isn't it? ----Mm, yes, 61 And it's supposed to get warmer. ----Yes, that's true. You know, though, I'm always a little worried to see winter go. ----- 62 -----Well, I love skating. In fact, I used to teach skating for a living. -----Oh? That sounds interesting. 63 -----I work at Bank of America. How about you? ----- 64 -----Here? -----No, I'm from Chicago. I'm just visiting here for the wedding. ----Oh, I see. ----By the way, 65 I'm Helen Keller. ----Nice to meet you. My name is John Smith.
F.What' your name? G. Really? |