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【单选题】
It is implied in the passage that ______.A.
the headmaster was very unreasonable since he put the older boys in charge of the work
B.
the younger boys were quite willing to offer their food and money for they were obedient to the older ones
C.
the older boys didn't get any punishment because they had had the whole work finished quickly
D.
the writer seems to feel regret for not having told their parents about their sufferings at school
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皮皮学刷刷变学霸
举一反三
【简答题】电涡流式传感器线圈阻抗的变化完全取决于被测金属导体的( )。因此当被测体与传感器间的距离改变时,传感器的等效阻抗、电感等均发生变化,于是把( )转换成电量。
【简答题】Listen and match. 听录音，将衣服、色彩连起来。 ( )1. sweaters ( )2. shoes ( )3. skirt ( )4. socks a. red b. yellow c. blue d. green
【简答题】电涡流式传感器的线圈与被测金属导体间的距离 x 的变化可以转换为________、________、________三个参数的变化。
【多选题】禁止跟踪出站调车的情况包括（）。
A.
降雾、暴风雨雪时
B.
出站方向区间内有瞭望不良的地形或有连续长大上坡道（站名表由铁路局公布）
C.
先发列车需由区间返回，或挂有由区间返回的后部补机
D.
一切电话中断