函数y=cos(2x+π4)的图象的一条对称轴方程为（ ） A．x=-π8 B．x=

用所给单词的适当形式填空.

1. They have some questions about                (understand ) real English.

2 .What do you think of             (they) English?

3. -Who is the               (one )student to come to the class  room?

    -I am .

4. -Does your sister enjoy              (work) in the hospital?

    -No ,she doesn't.

5. Try                (remember) five or six new words every day, you can learn English

如图15-2-21所示，将一根长为L的直导线，由中点折成直角放在磁感应强度为B的匀强磁场中，导线平面与磁感线垂直.当导线中通以电流I后，求磁场对导线的作用力.

图15-2-21

两个圆半径的和12厘米，一个圆直径10厘米，另一个圆的面积多少？

毛细血管搏动征见于

A．主动脉瓣狭窄
B．主动脉瓣关闭不全
C．二尖瓣关闭不全
D．二尖瓣狭窄
E．三尖瓣关闭不全

The government is to ban payments to witnesses by newspapers seeking to buy up people involved in prominent cases such as the trial of Rosemary West.

In a significant (51) of legal controls over the press. Lord Irvine, the Lord Chancellor, will introduce a (52) bill that will propose making payments to witnesses (53) and will strictly control the amount of (54) that can be given to a case before a trial begins.

In a letter to Gerald Kaufman, chairman of the House of Commons media select committee. Lord Irvine said he (55) with a committee report this year which said that self regulation did not (56) sufficient control.

(57) of the letter came two days after Lord Irvine caused a (58) of media protest when he said the (59) of privacy controls contained in European legislation would be left to judges (60) to Parliament.

56().

A.present 

B.offer 

C.manifest 

D.indicate