具有单向标尺的压力表，其允许误差是（）的百分数计算的。
参考答案：按测量上限
修复体粘固时最常用的消毒剂是（）
A.75%酒精
B.2%碘酊
C.1%碘氟
D.0.5%双氧水
E.2%高锰酸钾
In recent years, TCP/IP has also begun to be used by telephone companies to provide faster, cheaper telephone (67)
A．transmitting
B．transmited
C．transfers
D．transmissions
