夜间卧位型心绞痛的发生与下列哪项因素有关A．冠脉痉挛 B．左室排血量减少 C． 冠脉

根据句意完成已给出首字母或汉语提示的单词，使补全后的句子意思通顺、语法正确。

1. Tom and Sam are twins, but there are some d_____ between them．

2. Hawaii is f_____ for its beautiful beaches．

3. Our math teacher is a s_____ man．It seems that he never laughs．

4. Chinese medicine is now popular in many w_____ countries．

5. You can call Miss Zhang for more _____(信息)．

6. Your vacation _____ (计划) sounds wonderful．

7. My eating  _____  (习惯) is pretty good．

8. Lots of _____ (游客) come to Qingdao every day．

—Excuse me，but is that my dictionary?

—Oh, sorry, I took________ by mistake.

A．yours

B．mine

C．hers

D．his

无效合同的认定单位是( )。

A．工商行政部门

B．建设主管部门

C．招投标办公室

D．人民法院

肺炎与气管炎的鉴别要点为

A．高热

B．咳嗽、咳痰

C．两肺哮鸣音或干啰音

D．呼吸急促

E．血白细胞分类及分类

示波器中X轴的释抑电路的作用是（）。

A.阻止扫描发生器在回扫期内被外来脉冲触发，保持每次扫描的幅度相等

B.阻止扫描闸门电路在回扫期内被外来脉冲触发