授信业务获批后房地产开发资质在()级以下的,须存入一定比例的保证金。
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After stopping oily water separator, sea water should be permitted for () minutes,()should be closed after stopping pump to reduce oxidation corrosion of inner wall.
A. 15;inlet value
B. 15;inlet and outlet value
C. 30;inlet value
D. 30;inlet and outlet value
为了保证流量表的计量精度,应()检定一次。
A. 每月
B. 每季度
C. 每半年
D. 每年