99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<dl id="e9c82"><acronym id="e9c82"></acronym></dl>

單項(xiàng)選擇題

The sub-multiple prefix “micro” means （）.

A.thousandth (10 to the-3rd power)
B.millionth (10 to the-6th power)
C.billionth (10 to the-9th power)
D.trillionth (10 to the-12th power)

你可能感興趣的試題

單項(xiàng)選擇題

A signal derived from a controlled function and returned to the initiating point is called a/an （）.

A.monitoring signal
B.inverse signal
C.reverse signal
D.feedback signal

單項(xiàng)選擇題

The purpose of a main switchboard circuit breakers reverse-power trip is to （）.

A.prevent main circuit overload
B.protect the circuit breaker blowout coil
C.prevent alternator motorization
D.prevent low voltage tripout

<dl id="nixjx"><strong id="nixjx"><input id="nixjx"></input></strong></dl>

<em id="nixjx"></em>