平衡计分卡的内容包括( )。A．财务方面 B．客户方面 C．内部流程方面 D．学习

在数轴上表示出下列各数和它们的相反数，并把这些数和它们的相反数用“＜”号连接起来：2.5，3.5，4，-2

词汇运用 用括号内所给词的适当形式填空（每空不限一词）。（15分）

小题1:He is one of the best ____________(lead) in his country.

小题2:It is said that an old lady was found ________________(die) in the street three days later.

小题3:There will be an English test tomorrow, so she feels quite ___________(stress).

小题4:My parents don’t allow me _________(stay) out late to play football.

小题5:This nice bike is well worth __________________(buy).

小题6:You get a high mark. I think your teachers will be __________(satisfy) with your result.

小题7:His son looked at his broken toy with __________(sad).

小题8:Daniel told us that when he was a student he ___________(prefer) colour paper to photos.

小题9:The girl is too shy ____________(speak) in front of the whole class.

小题10:Exercise and healthy food are important to the _________(grow) of a child.

小题11:Finally, he worked out the math problem ______________(success).

小题12:They don’t know where ____________(buy) this kind of computer.

小题13:I hope my advice will be of great _________(value) to you.

小题14:---What will I do if someone ___________(laugh) at me?

---Pay no attention to them.

小题15:My father likes reading. He often buys ____________(week) newspapers to read.

如图所示，光滑水平轨道与半径为R的光滑竖直半圆轨道在B点平滑连接．在过圆心O的水平界面MN的下方分布有水平向右的匀强电场．现有一质量为m，电量为+q的小球从水平轨道上A、点由静止释放，小球运动到C点离开圆轨道后，经界面MN上的P点进入电场（P点恰好在A点的正上方，如图．小球可视为质点，小球运动到C点之前电量保持不变，经过C点后电量立即变为零）．已知A、B间距离为2R，重力加速度为g．在上述运动过程中，求：

（1）电场强度E的大小；

（2）小球在圆轨道上运动时的最大速率：

清洁生产将整体预防的战略持续地应用于（）

A.产品

B.产品生产

C.产品生产的全过程

D.产品和产品生产的全过程

在容积固定为2L密闭容器中，充入X、Y各2mol发生可逆反应：X(g)+2Y(g)2Z(g)达到平衡，以Y的浓度改变表示的化学反应速率、与时间的关系如下图，则Y的平衡浓度的表达式正确的是（式中S指对应区域的面积）（   ）

A．

B．

C．

D．