收盘价高于开盘价时，二者之间的长方柱用红色或空心绘出，这时其上影线的最高点是（）。A

Last week, my granddaughter started primary school. And I wished her every success. But part of me didn’t. I really wanted her to fail in some ways because I believe that failure can be good for us to grow up. Success is that you can do something that you already know you can do, or doing something correctly the first time. First –time success is usually a luck. First-time failure, in fact, is supposed to be the natural order of things. Failure is how we learn.

I make my living by writing articles for a daily newspaper. Each week I thought that the article that I write would be the worst. I try my best every day. A successful article usually means that I am discussing the subjects I know well, writing in the way I am used to or saying the same things as anyone else but in an excellent way.

My younger daughter is a trapeze artist荡秋千演员.she spent three years putting together a show, and she did it successfully for years. There was no reason for her to change it but she did anyway. She was afraid to be bored. She met failure when she tried some new ways in her show. But she did his only in order to feed her soul心灵。

My granddaughter is a perfectionist. She will feel her failures, and I will want to comfort her. But I will also, I hope, remind her of what she learned, and how she can do better next time. I hope I can tell her, though, that it’s not the end of the world. With luck, it is the beginning.

小题1:why id the writher want his granddaughter to fail?

A．success is boring though it can bring us something good

B．she would learn more form failure

C．it’s impossible to do everything successfully

D．he wanted her to be strong enough to face failure小题2:the writer talked about his own experience to show that___

A．we cannot depend on luck to live a good life

B．we should try every possible way to avoid failure

C．past failures made him afraid of writing more

D．the thought of failure will make you work even harder小题3:the underlined word “comfort” in the last paragraph probably means___

A．表扬

B．磨炼

C．安慰

D．批评小题4:the writer develop the article mainly by ___

A．giving examples

B．following the time order

C．comparing different ideas

D．presenting the reasons of failure

滑动变阻器是靠改变连入电路中电阻线的______来改变电阻的，从而改变电路中的______；变阻器要改变灯泡的电流，应该与灯泡______联．

（14分）如图所示，相距为d的平行金属板M、N间存在匀强电场和垂直纸面向里、磁感应强度为Bo的匀强磁场；在xoy直角坐标平面内，第一象限有沿y轴负方向场强为E的匀强电场，第四象限有垂直坐标平面向里、磁感应强度为B的匀强磁场。一质量为m、电量为q的正离子（不计重力）以初速度Vo沿平行于金属板方向射入两板间并做匀速直线运动。从P点垂直y轴进入第一象限，经过x轴上的A点射出电场，进入磁场。已知离子过A点时的速度方向与x轴成45^o角。求：

（1）金属板M、N间的电压U；

（2）离子运动到A点时速度V的大小和由P点运动到A点所需时间t；

（3）离子第一次离开第四象限磁场区域的位置C（图中未画出）与坐标原点的距离OC。

政策是在（）出现之后产生的社会活动。

A.民族部落

B.阶级、国家

C.资产阶级革命

D.社会主义制度

口器