Inductance is the property of an electric circuit that ()
A. opposes any change in the applied voltage
B. opposes any change in the current flow through the circuit
C. aids any changes in the applied voltage
D. aids any changes in the current through the circuit
当机件具有对称平面时,可将其一半画成视图,另一半画成(),这样所得到的图形称为半剖视图.
多糖改性后可能得到新的活性或增强原有活性。()可增强抗肿瘤活性,()可增强抗病毒活性。
膨胀机的启动时先确认膨胀机、膨胀增压机进出口(),膨胀机紧急切断阀和导叶(),回流()