Basal electric rhythm（BER）在人胃为（）次／分，十二指肠（）次／分。回肠末端为（）次／分。
Basal electric rhythm（BER）在人胃为（）次／分，十二指肠（）次／分。回肠末端为（）次／分。
相关考题：
In order to cut down on the carbon emission, more people choose to travel＿．A．by electric car, bicycle or planeB．by private car, bicycle or busC．by bus, electric car or planeD．by bicycle, bus or electric car
In order to cut down on the carbon emission，more people choose to travel______.A．by electric car，bicycle or planeB．by private car，bicycle or busC．by bus，electric car or planeD．by bicycle. bus or electric car
使用误码议在线测试或者对微波未用的2m支路通道环回测试，测试是否有误码告警，误码过高会导致传输闪断.微波的正常误码范围是（）。A、BER≤10-3B、BER≤10-4C、BER≤10-6D、BER≤10-7
单选题操作完后，关掉电动机。（）AAfter operation, start the electric motor.BBefore operation, stop the electric motor.CBefore operation, start the electric motor.DAfter operation, stop the electric motor.
单选题What type of electric motor is most commonly used on board ship?（）Anon-synchronous electric motorBsynchronous electric motorCfully enclosed electric motorDwatertight electric motor