国际通用的SOS求救信号是三次短闪,三次长闪,三次短闪。
参考答案:对
The voters were overwhelmingly against the candidate______proposals called for higher taxes.
A.who
B.whose
C.whom
D.which
何项为羊水过多()。
A.2000ml
B.>2000ml
C.1000ml
D.500ml
E.<300ml