最适于作疏水性药物润湿剂的HLB值是()。
A、HLB值为15~18
B、HLB值为7~9
C、HLB值为1.5~3
D、HLB值为3~6
E、HLB值为13~15
参考答案:B
The team has worked hard and its efforts have been _______with success.
A.rewarded
B.awarded
C.pleased
D.filled
关于臀位,正确的是()
A.胎体纵轴与母体纵轴垂直
B.混合臀位是指胎儿双髋关节屈曲,双膝关节伸直
C.胎心在母体脐下方
D.妊娠34周前不必纠正胎位
E.胎儿脐部娩出后,胎头娩出时长不能超过8分钟