男，56岁，右上腹隐痛，伴低热3月余，1小时前突感右上腹剧痛，继而全腹痛。体检：体温

用适当的介词填空。

1. Liu Hang sits _______ the right side of the classroom. Li Gang sits in the front.

    Zhang Xia sits next _______ him.

2. —Do you sit _______ the center of the classroom?

    —No, I sit on Meimei's right. We sit _______ the front now.

3. Look _______ the picture. There is a pig _______ it.

4. Can you see the blackboard _______ the wall?

    My teacher is drawing a tree _______ it.

5. There are some public phones _______ the street.

6. You can see the post office _______ the corner of the street.

7. There is a bird _______ the sky (天空).

8. My mother gets home _______ 6 o'clock every afternoon.

成熟DC最重要的功能是（）

A.摄取抗原

B.维持和诱导免疫耐受

C.免疫调节作用

D.抗原递呈与免疫激活作用

E.加工抗原

在“止宿交接，中间三日发病”（《华佗传》）中，“间”之义为（）

A．中间 

B．间隔 

C．病愈 

D．过了一会

国内信用证项下卖方押汇业务下，如果开证行非农行分支机构，无需审核其到期付款确认书（如有）是否有SWIFT加押报文证实。

切削前车刀必须紧固，车刀伸出长度一般不超过刀厚度的（）倍。

A.1.5

B.2.5

C.3.5

D.5