外用攻毒杀虫，内服截痰平喘的药物是（） A.轻粉 B.升药 C.砒石 D.硼砂 E.

—Miss Li has taught ____ English for about 3years.

—You are lucky. ____ is a very good teacher.

A．ours, She

B．our, He

C．us, He

D．us, She

用所给单词的适当形式填空。

1. It is ____________ (possible) for me to finish the work today. I need another day to do it.

2. this is our new classroom ____________ (build). There are eighteen classrooms in it.

3. The famous ____________ (science) Qian Suesen died of illness on October 31, 2009.

4. I ____________ (think) he could come to my party, but now I know I was wrong.

5. No one taught me. I learnt it all by ____________ (my).

脑栓塞的临床表现中，不正确的是（）

A.起病多急骤

B.年龄多较年轻

C.多有脑膜刺激征

D.常见局限性抽搐、偏瘫、失语

E.多有风湿性心脏病

《中国儿童发展纲要（2011-2020年）》要求到2015年全国婴儿死亡率下降到14%。

在介质中发生吸收现象比率的术语叫

A．衰减
B．吸收系数
C．波振
D．放大
E．扩散