在细菌间直接传递DNA是通过
A.鞭毛
B.普通菌毛
C.质粒
D.性菌毛
E.内质网
参考答案:D
阅读下面这首宋诗,然后回答问题。
庭户无人秋月明,夜霜欲落气先清。
梧桐真不甘衰谢,数叶迎风尚有声。
⑴这首诗写了秋天的哪些景致?
__________________________________
⑵本诗写梧桐,作者抒发了怎样的情感?使用了什么手法?
⑶古典诗词摹写梧桐抒发秋意,通常表达怎样的情怀?请举一例印证你的观点。
Why didn't you tell me there was no meeting today? I _____ all the way here _____the heavy snow.
A.needn't have driven;through
B.can't have driven;across
C.mustn't have driven;through
D.shouldn't have driven;cross