下列实验操作中错误的是（ ） A．蒸发操作时，当大部分固体析出时就停止加热，利

—This is English Department of Beijing University.

—Hi,I’m a student in English Department.I need to know the foreign professor—Mr.Smith’s email address.

—__________.I’m sorry,Mr.Smith does not have an email address in our system.

A．Just a minute　

B．I see

C．At your service　

D．It’s you 

痰液直接涂片镜检出现嗜酸性粒细胞及柱状上皮细胞均增多的疾病是（）。

A.肺结核

B.肺水肿

C.支气管哮喘

D.急性喉炎

E.肺炎链球菌肺炎

看图，用适当的句子完成对话。

1. —Good morning, Gina. What's this?

    — _____.

    — _____.

    —Yes,I can.

2. —What club does your brother want to join?

    —He wants to join the basketball club.

    — _____.

    —Yes, he can

3. —Can your aunts sing?

    —Yes, _____.

   —What club do they want to join?

    — _____.

4. —Can your uncle play the guitar?       

    —Yes, _____.

    — _____?

    Yes, he does. He wants to join the music club.

5. —Let's play basketball, Jim.

    —No, _____.

    — _____.

    —That sounds good.

下列属于人工主动免疫制剂的是

A．青霉素

B．乙肝疫苗

C．破伤风抗毒素

D．干扰素

E．补体

髋关节脱位判断复位满意的标准不确切的是：

A．双下肢等长

B．臀部隆起畸形消失

C．髂坐连线正常

D．髋活动障碍消失

E．蛙式试验阴性