空分装置冷箱内的管道冷补偿可采用（）。 A.不使用固定支架 B.加装膨胀节 C.利用

下列除哪项外均是半夏主治病证

A．湿痰、寒痰
B．胃气上逆呕吐
C．梅核气
D．热病神昏
E．瘿瘤

选择正确的替换词。

1. We have been friends for ten years.

A. since ten years              

B.ten years ago

C. since ten years ago          

D.ever since

2.I waited here for one and a half hours.

A. an hour and a half  

B. an hour and half  

C. half an hour  

D. a half and one hour

3. I have been collecting stamps for several years.

A. a little    

B. many      

C. much      

D. a few

4. More than twenty students come to school on foot in our class.

A. Less than    

B. Much than  

C. Over        

D. Around

5. Mom stores all the meat in the fridge , or it will go bad.

A. keeps      

B. lies        

C. has        

D. collects

在一般工作温度下,为了提高轴的刚度,可以采用合金钢代替碳钢。

3万英尺的高空属于（）层。

A.对流层

B.平流层

C.中间层

实际工作中的“一刀切”的错误是由于忽视了事物（）。

A.矛盾的斗争性

B.矛盾的同一性

C.矛盾的特殊性

D.矛盾的普遍性