“泠泠七弦上,静听松风寒”这句诗描写的是什么乐器?
参考答案:
古琴。
烷化剂类化疗药()
A.放线菌素
B.甲氨蝶呤
C.VCR
D.环磷酰胺
E.三苯氧胺
At the moment our technology is more advanced than theirs, but they are()fast.
A.catching up
B.catching on
C.catching at
D.catching out