读下面气温曲线图及降水柱状图，回答问题： （1）A、B两地气温年较差大的是 。

某工厂现生产某种零件30件，加工工序数为3，每道工序的单件加工时间为：t₁＝5分钟，t₂＝5分钟，t₃＝10分钟。

如果采用顺序移动方式，生产这批零件共需要（）分钟。

A.310

B.450

C.600

D.1800

Which one of the following independent situations would most likely be of the greatest concern to an investor when reviewing a potential investment’s corporate governance practices and policies（）

A. Without obtaining prior management approval, the board hired external consultants to advise them about recent environmental legislative changes related to the company.

B. As part of his compensation package, one director received a bonus for identifying a potential merger candidate. The company is currently negotiating a merger with that company.

C. One of the directors is the president of a major supplier to the company, but he recuses himself from board decisions related to the products his company supplies.

可靠性管理直接体现（），反映了对（）的满足程度。

按照《会计法》的规定，单位有关负责人在对外提供的财务会计报告上签章的下列做法中，正确的是（ ）。

A．签名

B．盖章

C．签名或盖章

D．签名并盖章

质软，条痕白色，断面显绢丝光泽的药材是

A．石膏
B．赭石
C．自然铜
D．朱砂
E．雄黄