(单选题)3: 熔断器的基本文字符号是()。 A: SA B: KM C: FU D: FR ...
(判断题)17: 电路的功率因数低会增加供电设备和输电线路的功率损耗。 A: 对 B: 错 ...
(判断题)11: 国家标准规定,随时间变化的物理量用大写字母表示。 A: 对 B: 错 ...
(单选题)5: 一般情况下,可采用()的方法来提高电路的功率因数。 A: 降低负载本身的功率因数 B: 在电感性负载上并联适当电容 C: 在电感性负载上串联电容 D: 以上选项均不正确 ...
(判断题)29: Should your L/C reach us at the beginning of May, we shall being able to ship your order. A: 对 B: 错 ...
(判断题)23: Elections take up every four years. A: 对 B: 错 ...
(单选题)17: He Ming ______ from college last year. A: graduated B: to graduate C: graduates D: Both a and c ...
(单选题)11: There are two sales divisions, one of ______ is under the Line Director, Mr. Smith. A: whom B: which C: that D: them ...
(单选题)5: Judy Black, ______ is in charge of the clerical staff, is the Office manager. A: that B: who C: whom D: both a and b ...
(判断题)29: Please send me an E-mail if you can come. A: 对 B: 错 ...