题目内容

Dictation: T-levels: a new vocational qualification for English teenagersThe world is changing; education must too, according to the government.T-levels will be 1______ to 16- year-old students who'd (= who would) normally be going on to study 2______ A-levels.They're 3______, covering subjects like finance and 4______, engineering and 5______ and construction.The plan is for employers to help create the courses and offer 6______ work placements.The first courses start in just over two years but there are 7______ that could be too soon for such a 8______ new program.Critics warn that rushing it through 9______ young people's futures. The government says, in a 10______ economy, T- levels are needed to prepare young people for the jobs of tomorrow.

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当有电流I 流过时半导体薄片时,在垂直于电流和磁场的方向上将产生电动势EH,这种现象称为()。

A. 霍尔效应
B. 压电效应
C. 电涡流效应
D. 热电效应

灵敏度与元件材料的性质和几何尺寸有关,厚度越小,灵敏度越高。

A. 对
B. 错

利用霍尔开关的这个特性可以测量转动部件的转数和转速。

A. 对
B. 错

检测转速常用的传感器有( )。

A. 霍尔传感器
B. 光电传感器
C. 数字编码器
D. 磁电传感器

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