蜜蜂美洲幼虫腐臭病具有诊断意义的症状是（）

A.房盖有穿孔

B.烂虫能拉丝

C.房盖颜色加深

D.房盖出现下陷

E.烂虫有腥臭味

— This desk is too heavy, I （）move it．Could you help me
— No problem.

A．can

B．can't

C．should

D．shouldn't