ICMP工作在( )层，是一种管理协议，用于在IP主机、路由器之间传递控制消息和差

如图甲所示，A、B是一对平行放置的金属板，中心各有一个小孔P、Q，P、Q 连线垂直金属板，两极板间距离为d，从P点处连续不断地有质量为m，带电量为m的带正电粒子沿P、Q方向放出，带电粒子的初速度和重力均忽略不计．从t = 0开始，在A、B间加上如图乙所示的交变电压，周期为T，电压为U．带电粒子在A、B间运动过程中，粒子间的相互作用力忽略不计．

（1）如果只有在每个周期为0~T/4时间内放出的带电粒子才能从小孔Q中射出，则上述物理量之间满足怎样的关系?

（2）如果各物理量满足第（1）问中的关系，求每个周期从小孔Q中有粒子射出的时间与周期T的比值．

患儿，见发热轻微，鼻塞流涕，伴有喷嚏及咳嗽，1～2天出疹，疹色红润，疱浆清亮，根盘红晕不明显，点粒稀疏，此起彼伏，以躯干为多，舌苔薄白，脉浮数。治宜（）

A．辛凉宣透，清热利咽

B．疏风清热，利湿解毒

C．清热解毒

D．清气凉营，泻火解毒

E．清热凉营解毒

阅读理解。

     The more women and minorities make their way into the ranks of management, the more

they seem to want to talk about things formerly judged to be best left unsaid.

     Consider the novel views on the subject of getting ahead.Coleman is black.He spent 11

years with IBM, half of them working in management development, and now serves as a

consultant to the likes of AT & T, Coca Cola.Coleman says that based on what he's seen at

big companies, he weighs the different elements that make for long term career success as

follows: performance counts a mere 10%; image,30%; and exposure, a full 60%.Coleman

concludes that excellent job performance is so common these days that while doing your work

well may win you pay increases, it won't secure you the big promotion.He finds that advancement

more often depends on how many people know you and your work, and how high up they are.

     Ridiculous beliefs? Not to many people, especially many women and members of minority races

who, like Coleman, feel that the scales have dropped from their eyes."Women and blacks in

organizations work under false beliefs," says Kaleen Jamison, a New York based management

consultant who helps corporations deal with these issues."They think that if you work hard, you'll get

ahead and someone in authority will reach down and give you a promotion." She added, "Most women

and blacks are so frightened that people will think they've gotten ahead because of their sex or color

that they play down their visibility." Her advice to those folks: learn the ways that white males have

traditionally used to find their way into the spotlight.

1．The best title for this passage would be________.

A．The Importance of Being Visible

B．Roles of Women and Minorities in Management

C．Job Performance and Advancement

D．Sex and Career Success

2．To achieve success in your career,the most important factor, according to the passage, is to_______.

A．work as a consultant to your superiors

B．project a favorable image to the people around you

C．let your superiors know how good you are

D．perform well your tasks given by your superiors

3．The reason why women and blacks play down their visibility is that they________.

A．know that someone in authority will reach down and give them a promotion

B．don't want people to think that their promotions are due to sex or color

C．don't want to give people the impression that they work under false beliefs

D．believe they can get promoted by reason of their sex or color

4．In the author's opinion, Coleman's beliefs are________.

A．biased  

B．popular

C．superficial  

D．insightful

“三个有利于标准”是( )。

A．政治标准

B．经济标准

C． 价值标准

D．判断一切工作是非得失的标准

经济适用住房指导价是根据平均成本加3%的利润确定，对管理水平较高的开发建设单位，由于劳动生产率较高，成本控制较好，实际利润可能高于3%，否则其利润可能会低于3%，甚至可能会亏本。( )