不属于医用诊断X线装置主电路工作方式的是A．工频式 B．逆变式 C．倍压式 D．电容

The doctor did __________ save the patient’s life.

A．that he could do

B．all what he could

C．all he could to

D．which he could

同工酶

根据句意和首字母填写单词。

1. Hemingway is her favorite a_____.

2. He was the only little kid at the p_____.

3. She always listens to c_____ music.

4. I'm really a_____ because I can't find my backpack.

5. I always go to c_____ because I love music.

6. It's c_____ because it makes up 50% of the final exam.

颈椎椎管狭窄的定义是椎管直径（）

A.≤11mm

B.≤14mm

C.≤15mm

D.≤20mm

E.≤10mm

台湾记者来大陆采访始于哪一年？