民国时期的一封书信里这样写道：“东北已是共军的天下，国军困守孤城，为了当朝的既得

下列各种生物形成一条食物链，正确的是（　　）

A．植物→兔→鹰

B．植物→狼→山羊

C．阳光→青蛙→蛇→鹰

D．兔→狼→细菌

根据答句写问句。

1．A:________________________________________________________________ 

     B: I am a bank clerk.

2．A:________________________________________________________________ 

     B: My sister is a sales girl.

3．A:________________________________________________________________ 

     B: Jim's mother works at a hospital.

4．A:________________________________________________________________ 

     B: Because I like teaching. It's an interesting job.

5．A:________________________________________________________________ 

     B: No, I cook at home every day.

6．A:________________________________________________________________ 

     B: Yes, I do. I help the patients carefully.

7．A:________________________________________________________________ 

     B: You can contact us at 58902314.

8．A:________________________________________________________________ 

     B: My aunt wants to be a housewife.

9．A:________________________________________________________________ 

     B: Yes, he is. He is very busy in the restaurant.

10．A:_______________________________________________________________ 

       B: Yes, I am. I study at Brooklyn High.

除下列哪一项外其余均是阴囊内容物（）。

A.睾丸

B.附睾

C.肾小球

D.输精管

8个月婴儿，单纯母乳喂养，面色苍白2个月。肝肋下1．0cm，脾肋下未触及，Hb80g/L，RBC3．5×10¹²／L，MCV68fl，红细胞大小不等，中心浅染区扩大，网织红细胞、血小板和白细胞数均正常。最可能的诊断是（）

A.营养性缺铁性贫血

B.营养性巨幼细胞性贫血

C.营养性混合性贫血

D.再生障碍性贫血

E.遗传性球形红细胞增多症

最常用的轴测投影法有（）

A.正等测

B.斜等测

C.正二测

D.斜二测