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问题 单项选择题

下图表示人类某单基因遗传病的系谱图。假设3号与一正常男性婚配，生了一个既患该病又患苯丙酮尿症（两种病独立遗传）的儿子，预测再生一个正常女儿的概率是（）

A.9/16

B.3/16

C.2/3

D.1/16

答案

参考答案：B

多项选择题

国际推介的主要目的是（）。

A.查明长期投资者的需求情况，保证重点销售

B.使投资者了解发行人的情况，作出价格判断

C.利用销售计划，形成投资者之间的竞争，最大限度地提高价格评估

D.为发行人与投资者保持关系打下基础
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补全对话，情景问答
选用方框中所给词填空
outside, food, for, like, no, want, How's, wear, rules, T-shirts, eat, study, classes, awful
Jerry:  Hey,Ben!   1  your new school?    
Ben: It's   2  .I don't like their rules.    
Jerry: Yeah? What   3  ?Do you have to   4  a uniform?    
Ben: No,we don't. But we can't wear  5  .    
Jerry: Oh. How is the   6  ?    
Ben: Awful! And we have to   7  in the cafeteria.    
Jerry: Can you go home    8   lunch?    
Ben: No,we can't,and we can't eat   9  .    
Jerry:What do you have to   10  ?    
Ben: Math, science, history, geography, computer science...And we have to study English.
It's OK,but I   11  to study French and Spanish,too.    
Jerry: And you can't?    
Ben:   12  ，I can't.    
Jerry: Do you have to go to physical education    13  ?    
Ben: Yes,I do,but I   14   physical education.
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