静电防护措施主要有()、增加空气湿度、静电中和、()。
参考答案:导体接地;降低电阻率、掌握静电序列规律
—Do you know tomorrow?
—David? Never! He hates outdoor activities.
A.whether David will go cycling with us
B.when will David go cycling with us
C.that David would go cycling with us
D.who David would go cycling with
浮动床与固定床相比有何优缺点?