行李、包裹装卸费的收费标准为（）。
A.2形件次
B.1形件次
C.5形件次
D.3形件次
参考答案：B
- How was the performance last night?
- It was so good. Though it ＿＿＿＿＿＿ nearly four hours, few people left early.
A．covered
B．reached
C．lasted
D．played
在药物重金属检查法中，溶液的PH值在（）
A、3－3.5
B、7
C、4－4.5
D、8
E、8－8.5
