评价催化裂化原料性质的主要指标有那些？

----- I had a really good weekend in the countryside.

----- ___________________________.

A．Oh, that’s very nice of you

B．Congratulations

C．It’s a pleasure.

D．Oh, I am glad to hear that.

Although it has been buried underground for over 1,000 years, the ancient queen’s body remains well _____.

A．defended

B．preserved

C．guarded

D．organized

胸部CT常规为仰卧位，需同时采用俯卧位的是()

A．肺癌的分期诊断 

B．观察肺内肿物形态 

C．测量肺内病变大小 

D．了解胸水流动性 

E．对肺弥漫性病变观察

试述气性坏疽的临床表现和诊断要点。

砂、石材料进场后，一般每个工程检验一批即可满足规范要求。