单项选择题

Negotiation is a process reserved only for the skilled diplomat, top salesperson, or ardent advocate for an organized lobby. （）

A．对
B．错

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单项选择题

When deciding on which book to read, we need to consider _______.
① Popularity of the book.
② Our English proficiency.
③ Our reading purpose.
④ The writing style of the book.
⑤ Our interest.
A、②⑤
B、①③
C、④⑤
D、①④

真菌无性繁殖和有性繁殖在病害发生流行中的作用是什么？

答案：真菌无性繁殖阶段产生无性孢子，特点是（1）无性繁殖在生活史中往往可以产生多代，（2）产生一代的实践比较短，（3）产生的无...