【简答题】How many broadcasters from international networks are there in the center? ______
【简答题】因为接入瓦特表的电流是经过电流互感器变换过的电流,所以瓦特表显示的刻度要
【单选题】听力原文:M: How many students took the exam last Friday? W: Well, fifty had registered, but only half of them showed up. How many students were absent from the test?
【简答题】How many elephants have been taken off the streets and brought here to the elephant center?
【单选题】下列说法正确的是( )
D.
某系统中含有氮气和氩气。只有当系统的温度等于 298.15K 同时氮气和氩气的分压和为 100kPa 时,该系统才是处于标准状态。
【简答题】功率方向元件中,利用判别 的方向或短路后电流、 之间的 关系,就可以判别发生故障的方向。
【单选题】How many exam centers are there in Algeria?
【单选题】How many laser printers in the computer center?