搜题请搜索小程序“爱下问搜题”
问题 单项选择题

渗透检测法可以用来检测出那种情况下的缺陷（）。

A.多孔型材料表面开口的缺陷和损伤

B.材料内部的缺陷和损伤

C.校准磅称

D.材料表面开口的缺陷和损伤的深度

答案

参考答案：C

判断题

期货交易所会员的保证金不足时，期货交易所应当立即将该会员的期货合约强行平仓，以防风险。()
查看答案
单项选择题

Questions 6 to 10 are based on the following news.

A. The eruption has caused widespread disruption to air traffic.
B. The authority has imposed a local flight ban.
C. It might lead to the closure of a large section of European airspace.
D. The ash particles are coarse and could cause aircraft engines to fail.
查看答案