简述免疫组化染色特异性和非特异性显色的鉴别方法。

从集合A={1，2，3}到集合B={a，b}的不同映射共有______个．

下列适用于风寒咳嗽的药是

A．二母宁嗽颗粒

B．半夏止咳糖浆

C．蛇胆川贝液

D．止嗽定喘口服液

E．百合固金丸

变色酸2R（Chromotrope2R）一亮绿染色法可把髓鞘染成（）

A.红色

B.黄色

C.蓝色

D.绿色

E.紫色

根据汉语提示完成句子。

1. Bridge is _______________(以……开始) a "B".

2. Will you please          the TV         (接通)?

3. Success                 (要求) hard work.

4. There are many kinds of animals                 (处于危险中).

5. The young man felt sad because he ________________(失业) last week.

Which one of the followings is incorrect?（）

A.My vessel was anchored waiting for dry-docking

B.Only towards the end did I sound the alarm

C.Hearing emergency alarm,everyone got confused

D.When everything was almost under control, it is unnecessary to bother others