通常国家标准《自动化仪表工程施工及验收规范》(GB50093-2002)是设计、施工、()三方面都接受的标准。
A、安全单位
B、评定单位
C、安装单位
D、建设单位
参考答案:D
用所给词的适当形式填空
1. Look! This is _____ (Jim) family.
2. There are four _____ (people) in my family.
3. Betty _____ (have) got a sister.
4. They _____ (not have) got any apples.
5. My family _____ (be) at home in the evening.
6. _____(they) books are on the desk.
7. I have got one aunt and three _____(uncle).
8. _____ (have) your father got a brother?
9. Tom is in Class One with Linda and _____ (I).
10. I have got a sister. _____(she) name is Lucy.
在感染过程的5种表现中所占比例最低但最易识别的是()。
A.病原体被清除
B.隐性感染
C.显性感染
D.病原携带状态
E.潜伏性感染