中部微带青质量低于C3V的烤烟烟叶应列入（）定级。

---Are you going to take part in the English speaking contest?

---_______. It’s too good an opportunity to miss.

A．That’s for sure

B．No problem!

C．Why me?

D．Why bother?

室壁瘤的主要依据是（）

A.频发室早

B.病理性Q波及sT段持续抬高

C.T波倒置

D.运动试验阳性

E.慢性心功能不全

紫外线灭菌法中灭菌力最强的波长是

A．250nm

B．251nm

C．252nm

D．253nm

E．254nm

I had just finished all my homework and was about to go to bed    the phone rang.

A．when

B．until

C．while

D．before

下列同学的着装符合体育课的要求的是（）

①王明穿运动鞋打排球

②张琴别校徽上体育课

③万亮不戴眼镜做俯卧撑

④李丽穿裙子做操

A、①③

B、②④

C、①②③

D、①④