A:came; would have come
B:had come; would have come
C:would have come; had come
D:would come; had come
一般情况下,两种活泼性不同的金属在潮湿的环境中接触时,活泼性强的金属首先被腐蚀。为了避免轮船的钢质外壳被腐蚀,通常在轮船外壳上镶嵌的金属是( )
用棋子摆出下列一组图形:
按照这种规律摆下去,第n个图形用的棋子个数为( )
We missed the concert____ ____the heavy rain.
—Hello! This is David. Can I speak to Tom? —Yes, ___________.
将下列陈述句改成反问句
①那是文天祥。
②文天祥不会屈服。