分部分项工程开始作业前相关机械、工器具应(),通过进场检查,安全防护设施及防护用品配置齐全、有效
参考答案:检验合格
A _______ number of mothers with young children are stopped from undertaking paid work because they lack access to childcare.
A.considerate
B.critical
C.fundamental
D.substantial
下列哪种β受体阻滞剂为超短药物()
A.美托洛尔
B.普萘洛尔
C.乌拉地尔
D.拉贝洛尔
E.艾司洛尔