It's about time that the articles _________. A: are published B: were published C: shall be published D: will be published

This is one of the best books _______. A: that have been published B: that has been published C: that have published D: that has published

10.His new book___ next month. A: will be published B: is publishing C: is being published D: has been published

20. ____ at such a time, his work attracted much attention. A: Publishing B: Being published C: Published D: When published

双绕组降压变压器，一、二次侧额定值的关系是（）。 A: SN=SN，UN＞UN，IN＞IN B: SN=SN，UN＞UN，IN＜IN C: SN＞SN，UN＞UN，IN＞IN D: SN＞SN，UN＞UN，IN＜IN

c'est ___dentiste，il est ___japonais. A: un,un B: une,un C: un,/ D: /,/

His new book （） next month. A: will be published B: is publishing C: is being published

并励直流发电机的额定功率可表达为 。 A: UN ·IN B: UN ·IN ·η C: UN ·(IN - IfN) D: UN ·(IN - IfN)·η

并励直流发电机的额定功率PN等于( )。 A: UN INηN B: UN IN C: UN IN/ηN D: UN Ia

在发电机空载运行状态下，自动电压调节器和手动调节单元的电压给定值变化速度，应不大于（）/s，不小于（）/s。 A: 2%Un、0.3%Un B: 1%Un、0.3%Un C: 2%Un、0.5%Un D: 1%Un、0.5%Un