Mr White ____ the newspaper while his da_爱下问搜题

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问题选择题

Mr White ____ the newspaper while his daughter ____TV. [ ]

A. has read; was watching

B. was reading; watched

C. was reading; was watching

D. reading; watched

答案

答案：C

单项选择题

冬季田间有无稻苗或再生稻有活是（）能否越冬的重要标志。

A.二化螟

B.三化螟

C.稻褐飞虱

D.稻纵卷叶螟

单项选择题

二尖瓣狭窄患者，提示其瓣膜尚有一定弹性的听诊标志是（　）

A．心尖区第一心音减弱

B．舒张期杂音局限不传导

C．肺动脉瓣区第二心音分裂

D．二尖瓣开放拍击音

E．吸气时杂音减轻或消失