【单选题】We had to wait a long time to get our passports, __________?
【单选题】在一组等精度观测中,当被观测量的真值无法得知时,( )就是被观测量真值的最可靠值。
【判断题】()“Promises” like Why don't we get together one of these days? , though frequently made by Americans, are no commitment.()
【单选题】Things will turn bad if we ______ there on time.
【单选题】当土的渗透系数很小时基坑降水宜采用( )
【单选题】The reason that scientists cannot cure a common cold is_____.
A.
we don't know how we get cold
B.
we aren't sure the exact kind of cold viruses
C.
we don't know when we will catch cold
D.
we aren't sure the exact scientific method
【简答题】A.We don't know the long-term effects of it. B.We don't have the technology to get rid of it. C.It is a cause rather than a symptom. D.We have to accept the reality and try to change society.
【单选题】They don't think we can get first place in the speech contest, ________ ?
【单选题】If we don't hurry up, everything ________ by the time we get to the party.