可追溯性系统应能够识别（）A原辅料的直接供应方B原辅料的间接供应方C终产品的直接分销

接触网作业车在车站停时超过（）分钟，动车前须进行制动机简略试验。

A.30

B.40

C.20

以下哪项不是人类基因组计划的基本任务（）

A.遗传图谱

B.染色体定位

C.物理图谱

D.基因图谱

E.序列图谱

W: We don’t seem to have a reservation for you, sir, I’m sorry.
M: But my secretary said that she had reserved a room for me here. I phoned her from the airport this morning just before I got on board the plane.
Q: Where does the conversation most probably take place().

A. At the airport.

B. In a restaurant.

C. In a booking office.

D. At the hotel reception.

采用钢筋混凝土柱作灯柱时，梢径一般采用（）mm为宜。

A.150

B.160

C.170

D.190

淋证分为（）、血淋、石淋、膏淋、气淋、劳淋六种。