企业的资质等级，按照分包序列等级分为（）。
A.总承包
B.专业分包
C.半包
D.劳务分包
参考答案：A, B, D
The nurse is teaching a group of patient-care attendants about infection-control measures. The nurse tells the group that the first line of intervention for preventing the spread of infection is （）.
A．wearing gloves.
B．administering antibiotics.
C．washing hands.
D．assigning private rooms for clients.
孕前体重超过标准体重120%的女性，其适宜的孕期增重为______kg。
A．10
B．12
C．14
D．7～8
