华夏银行对外开立信用证和外汇保函应向客户收取一定比例的保证金，该保证金应是（）。A.

已知（a+2b）²=（a-2b）²+A，则A=______．

泌尿系肿瘤中最常见的为

A．肾胚胎瘤

B．肾细胞癌

C．肾盂肿瘤

D．输尿管肿瘤

E．膀胱肿瘤

阅读理解。

      You are watching a film in which two men are having a fight. They hit one another hard. At the start they

only fight with their fists. But soon they begin hitting one another over the heads with chairs. And so it goes on

until one of the men crashes through a window and falls thirty feet to the ground below. He is dead!Of course

he isn't really dead. With any luck he isn't even hurt. Why? Because the men who fall out of high windows or

jump from fast moving trains are professionals. They do this for a living. These men are called stuntmen. That

is to say, they perform tricks. There are two sides to their work. They actually do most of the things you see

on the screen. For example, they fall from a high building. However, they do not fall on to hard ground but on

to empty cardboard boxes covered with a mattress (床垫). Again, when they hit one another with chairs, the

chairs are made of soft wood and when they crash through windows, the glass is made of sugar! But although

their work depends on trick of this sort, it also requires a high degree of skill and training. Often a stuntman's

success depends on careful timing. For example, when he is "blown up" in a battle scene, he has to jump out

of the way of the explosion just at the right moment.

       Naturally stuntmen are well paid for their work, but they lead dangerous lives. They often get seriously

injured, and sometimes killed. A Norwegian stuntman, for example, skied over the edge of a cliff (悬崖) a

thousand feet high. His parachute (降落伞) failed to open, and he was killed. In spite of all the risks, this is no

longer a profession for men only. Men no longer dress up as women when actresses have to perform some

dangerous action. For nowadays there are stuntgirls tool.

1. Stuntmen are those who ______. [ ]

A. often dress up as actors

B. prefer to lead dangerous lives

C. often perform seemingly dangerous actions

D. often fight each other for their lives

2. Stuntmen earn their living by ______. [ ]

A. playing their dirty tricks

B. selling their special skills

C. jumping out of high windows

D. jumping from fast moving trains

3. When a stuntman falls from a high building, ______.[ ]

A. he needs little protection

B. he will be covered with a mattress

C. his life is unprotected

D. his safety is generally all right

4. Which of the following is the main factor (因素) of a successful performance? [ ]

A. Strength.

B. Exactness.

C. Speed.

D. Carefulness.

5. What can be inferred from the author' s example of the Norwegian stuntman? [ ]

A. Sometimes an accident can occur to a stuntman.

B. The percentage of serious accidents is high.

C. Parachutes must be of good quality.

D. The cliff is too high.

预防脑卒中深静脉血栓形成错误的是（）

A.鼓励患者经常做足和趾的主动运动

B.多做深呼吸及咳嗽动作

C.尽可能早期下床活动

D.必要时下肢穿医用弹力长袜

E.禁用抗血小板凝聚药物

关于竣工结算的程序表述，正确的是（）

A.承包人应在合同约定时间内编制完成竣工结算书，并在提交竣工验收报告的同时递交给发包人

B.发包人在收到承包人递交的竣工验收报告后，应按合同约定时间核对

C.竣工结算办理完毕，承包人应将竣工结算书报送工程所在地工程造价管理机构备案

D.同一工程竣工结算核对完成，发、承包双方签字确认后，发包人可以要求承包人与另一个或多个工程造价咨询人重复核对竣工结算