直角扣件,旋转扣件的抗滑承载能力设计值为()。
A.6KN
B.8KN
C.7KN
D.8.5KN
参考答案:B
.It was so dark in the cinema that I could hardly ________ my friend.
A.turn out
B.bring out
C.call out
D.pick out
对于看跌期权来说,市场价格高于协定价格的期权为实值期权。( )