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问题 单项选择题

抗着床避孕药是：

A．以上均不是

B．大剂量雌激素

C．丙酸睾酮

D．大剂量甲地孕酮

E．炔雌醇

答案

参考答案：D

解析：[解题思路] 甲地孕酮的避孕机理。大剂量甲地孕酮可干扰子宫内膜正常发育，使之不利于孕卵着床。

连词成句

仿照例句用所给的词汇造句。

例：I, see him, he, cross the street

       I saw him while he was crossing the street. (He was crossing the street when I saw him.)

A. the sun, shine, we, come out

                                                                                                                 

B. she, study at college, the war, break out

                                                                                                                 

C. she, work in a factory, the city, be liberated (解放) 

                                                                                                                 

D. he, lose his pen, he, go sightseeing in the city 

                                                                                                                  
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单项选择题 A1/A2型题

银焊不能用于哪类金属的焊接（）

A.镍铬合金

B.银钯合金

C.金铂合金

D.钴铬合金

E.以上均不能
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