【单选题】弯沉评定中,最合理的合格标准为()(l为弯沉代表值,为dl设计弯沉值)。
【单选题】What is the main idea of the passage?
A.
The way of the school standards setting of US is badly wrong.
B.
American school standards vary from state to state.
C.
America should have a national school standard set by experts.
D.
President Obama makes active policies on school standards in US.
【单选题】人体与带电体的直接接触电击可分为两相电击、()。
【单选题】弯沉评定中,最合理的合格标准为___(l为弯沉代表值,ld为设计弯沉值);
【单选题】弯沉评定中,最合理的合格标准为( )(L为弯沉代表值,为Ld设计弯沉值)。
【多选题】根据人体与带电体的接触方式不同,直接接触触电可分为()。