下列可用于测定溶液PH且精确度最高的是
答案:B
If the building project_______ by the end of this month is delayed, the construction company will be fined.
A.completed
B.is completed
C.to be completed
D.being completed
电子设备信号接地型式中多点接地适用于频率大于()MHz的电子设备。
A.10
B.8
C.6
D.4