【简答题】.如图,正方体ABCD-A 1 B 1 C 1 D 1 中,AC与B 1 D所成的角为 度
【单选题】如图正方体 ABCD-A 1 B 1 C 1 D 1 中, BC 1 与 B 1 D 1 所成的角为()
【单选题】We have to investigate as _________ customers as possible in order to make sure of the potential of the market.
【单选题】We learn from Paragraph 2 that outside directors are supposed to be______.
C.
share price forecasters
【多选题】某项经济业务的发生没有影响所有者权益,则可能导致
【单选题】.This piece of evidence doesn’t _______ what the other witness said. We have to conduct a full investigation.
【简答题】如图, 在正方体ABCD—A 1 B 1 C 1 D 1 中,E,F分别是正方形A 1 B 1 C 1 D 1 和ADD 1 A 1 的中心,则EF和BD所成的角是 。
【单选题】Ten minutes earlier, ______ we could not have been a aught in the heavy rain.
【简答题】如图,在正方体ABCD-A 1 B 1 C 1 D 1 中,求证:平面A 1 BD∥平面CD 1 B 1 .
【单选题】The hardware makers ______.
A.
have obtained enormous profits from the operation
B.
have invested heavily on the research of new products
C.
have helped doctors and hospitals gain more experience
D.
have successfully proved the effectiveness of their products