You shouldn't ________ your hope. Everyt

一怀孕5个月的孕妇因下腰痛前来就诊，诊断为慢性腰肌劳损，可行下列哪项治疗（）

A.超短波

B.超声波

C.蜡疗

D.磁疗

E.干扰电

_______ by keeping down costs will Power Data hold its advantage over other companies.

A．Only

B．Just

C．Still

D．Yet

根据句意，用括号中所给单词的正确形式填空。

1. —How old is your son?   —He's _______ (nine) years old.

2. It's __________(harm) to your eyes to watch cartoons for hours. Go to have a rest.

3. Your pocket is much bigger than the _________(woman).

4. Don't worry. Peter is a good driver. He always drives_______ (careful) enough

5. We all like the wine because it is ______(make) from grapes.

6. Hard work can bring you _______(success).

7. —Who teaches ______(they) English?   —Nobody. They teach themselves.

8. He saw the doctors _______(operate) on his daughter when he came into the room.

影响X线照片密度的因素错误的是（）

A.照射量

B.管电压

C.摄影距离

D.被照体厚度

E.被照体面积

陈调苍凉粗犷，故后来常作为（）的专用唱腔。