—Is that Jack speaking? —Sorry, he ______爱下问搜题

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问题选择题

—Is that Jack speaking?

—Sorry, he _______ in. He _______ back in half an hour. [ ]

A. isn't; will be

B. wasn't; will

C. isn't; is

D. wasn't; was

答案

答案：A

读图填空题

看图填写。

(1)写出结构名称①____、②____、③____、④____、⑤____、⑥____。

(2)属于生殖器官的是____，属于营养器官的是____。

(3)植物体的结构层次由微观到宏观的顺序是：____、____、____、____。

判断题

湿式弱磁场磁选机用于分选强磁性矿。