3．如图所示，木块M上表面是水平的，当木块m置于M上，并与M一起沿光滑斜面由静止开始下滑，在下滑过程中（    ）

2．图中的实线表示电场线，虚线表示只受电场力作用的带正电粒子的运动轨迹，粒子先经过M点，再经过N点，可以判定（     ）

A．M点的电势大于N点的电势

B．粒子在M点的电势能小于在N点的电势能

C．粒子在M点动能大于在N点的动能

D．粒子在M点受到的电场力小于在N点受到的电场力

1．下列说法中正确的是（     ）

A．作受迫振动的物体的频率由它的固有频率来决定

B．产生多普勒效应的原因是波源频率发生了变化

C．频率不同的声波在空气中的传播速度相同

D．在干涉图样中的振动加强线上各质点的振动位移总是最大

10.M: Shall I take a bus?

  W: No, you can walk there, It’s not far.

The Water World Swimming Pool is open from 8:00 am to 7:30 pm every day. There is a special cheap price for students with the student card. The price is one pound forty.

But you must bring your student card with you.

On Wednesday morning the pool is only to mothers and babies. Please leave your children at home on Wednesday mornings.

The new Water World Cafe is nearly finished. The Cafe will open on June 22 nd. In the Cafe you can watch the swimmers or enjoy a drink after you swim.

Thank you for calling and we look forward to seeing you at the Water World Swimming Pool.

九年级英语?清明节独立测试卷

9. W: What’s the time by your watch?

  M: Ten thirty. But it’s five minutes slow.

8. M: You work harder than John..

  W: But Kate works even harder.

7. W: What can I do for you?

  M: I’d like a pair of socks.

6. W: Shall we go to park tomorrow?

  M: Sorry, I’m busy .How about next Saturday ?

  W: OK !   

5. M：What’s your trouble ,madam ?

  W：I’m not feeling well . My head hurts

4. M：Are you going to Sydney for the coming holiday , Ann?

  W：Oh , no. It costs too much . I’m going to Beijing .