北回归线穿过的省区,自西向东排列正确的是()
①广东②广西③云南④台湾
A.①②③④
B.③①②④
C.③②①④
D.④①②③
参考答案:C
They _________to see you off at the airport, but they got there too late.
A.have hoped
B.had hoped
C.would hope
D.hope
为什么基因突变大多数是有害的?