纯化水的制备设备正常开机后，水站人员（）监控一次设备运行参数。
A、2次/班
B、2小时
C、4小时
D、1次/班
参考答案：B
A．Many New Yorkers agree about banning this form of sonic pollution.
B．The police have formed a posse to reduce the amount of noise.
C．Police can break into a car as soon as the alarm goes off.
D．Car alarms are very effective at preventing theft.
水平气压梯度力与（）
A．空气密度成反比，与气压梯度成正比
B．与空气密度成正比，水平气压梯度成正比
C．与空气密度成反比，水平气压梯度成反比
D．与空气密度成正比，水平气压梯度成反比
