系膜增生性肾小球肾炎( )
A.C3一过性降低,8周后恢复正常B.C3持续性降低C.C3在肾炎活动时降低明显,肾炎控制后有回升趋势D.C3一般不降低E.C3增高
参考答案:D
The teacher _____ his students to leave the classroom as soon as possible. [ ]
A. required
B. suggested
C. demanded
D. desired
《安全生产法》对生产经营单位主要负责人和安全生产管理人员的安全资格是如何规定的?