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问题 补全对话，情景问答
从方框里选择合适的选项完成对话。
A: Is that the picture of your family?
B: ______1_______
A: Who's that?
B: _____2_______
A: Is that your mother?
B: _____3________
A: Is this your mother?
B: _____4________
A: Who's this man? Is he your father?
B: _____5_______
a. Yes, she is.
b. No, that's my aunt, my father's sister.
c. That's my grandfather.
d. Yes, it is.
e. No, he's my uncle. This is my father.
答案

1-5 dcbae

填空题

肺泡壁    _____     ，仅由               ，肺泡外表面缠绕丰富            ___和___________，这些结构特点有助于进行气体交换。
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问答题

有3个考官测试30个学生，考官1认为有15个通过，考官2认为有7个通过，考官3认为有24个通过，且只有3个考官都认为通过才能算学生通过，问至少有多少学生通过
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