塑料大棚育苗，棚内空气相对湿度一般控制在（）。A.60% B.70% C.80% D_爱下问搜题

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问题单项选择题

塑料大棚育苗，棚内空气相对湿度一般控制在（）。

A.60%

B.70%

C.80%

D.90%

答案

参考答案：B

选择题

There is ____ orange on ____ table.

A. a; the
B. an; the
C. the; a

选择题

I’m sorry I got caught in the traffic；________, I could have been here sooner.

A．besides

B．although

C．anyway

D．otherwise