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问题 选择题

沿水平方向分别拉重1000 N和500 N的两辆车做匀速直线运动，若两车都前进10 m，且所用水平拉力都是200 N，设拉力对较重的车做功为W1，对较轻的车做功W2，则[ ]

A.W1＞W2

B.W1＜W2

C.W1=W2

D.无法判断

答案

答案：C

单项选择题

患者，男性，26岁。排柏油便2天。既往无胃病史及肝病史，近期无服药史。查体：血压70/40mmHg，心率120/min，腹平软，无压痛，肝脾未及

首选的处理方法是

A．急诊胃镜止血

B．口服正肾冰盐水

C．中药治疗

D．补充血容量

E．静脉用止血药物
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单项选择题

An analyst routinely has the opportunity to offer his clients the opportunity to purchase "hot new issues. " He tells his clients that he will distribute each issue equally among those interested, with himself included in the distribution. The clients do not object to this. With respect to Standard Ⅵ (B) , Priority of Transactions, this :（）

A. cannot be a violation because the clients know of the practice and agree.

B. may be a violation because it is impossible to distribute hot new issues equally.

C. may be a violation despite the clients’ approval.
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