一般角膜伤口长度在多少mm以下可不缝合（）
A.2
B.5
C.3
D.1
E.4
参考答案：C
—_____ I swim in that river?
—No, you ______. It's dangerous to swim in it.[ ]
A. Must; can't
B. can't; may not
C. May; mustn't
D. Must; needn't
承包方对其承包的基本农田，不得进行的行为是（ ）
A．有偿流转土地承包经营权
B．自主地进行生产经营
C．在承包的基本农田上挖鱼塘
D．与其它承包方互换经营权
