Rip currents can be ________ to people in the water.

Trains usually have two to convert currents. A: coolingfans B: rectifiers

What does the professor ask the student to explain ？（） A: Why the book talks about turbidity currents. B: How winds can affect some ocean currents. C: The causes of underwater earthquakes. D: What a turbidity current is.

Data relating to the direction and velocity of rotary tidal currents can be found in the ______

What does Luigi Galvani's research with applied electrical currents suggest?

Trains usually have two ________ to convert currents. A: cooling fans B: locomotives C: circuit breakers D: ectifiers

Trains usually have two ________ to convert currents. A: cooling fans B: locomotives C: circuit breakers D: rectifiers

We must determine the values of the currents(电流) and voltages(电压) just after the switch closes.

【判断题】Changes in ocean currents and temperature will cause the weather change.() A. 对 B. 错

Choose those that are connotations of the word "ocean". A: expansiveness B: peace C: often with waves and currents D: tranquility