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【判断题】
CA6140型车床的调试时,控制回路试车时,先接通低压断路器QS,检查熔断器FU1前后有无380V电压。A.
正确
B.
错误
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举一反三
【简答题】环境中常见的原生动物分为 纲 、 纲和 纲。
【单选题】We had warned him ____________ of his carelessness. Now we will have to fire him.
A.
again and again
B.
again by again
C.
little by little
D.
little and little
【单选题】We had warned him() the danger but he turned a deaf ear to our warning.
A.
in
B.
out
C.
of
D.
on
【简答题】He burned his fingers badly, though we warned him against it. He lost nearly all his money he had invested.
【简答题】Ugly, a male cat, loved three things in this world: fighting, eating garbage, and, shall we say, love. To start with, he had only one eye and where the other should have been was a big hole. He was al...
【单选题】据考古发现,在战国中晚期墓葬中,河北兴县一次出土铁范87件,大多为农具范。河南新郑铸铁作坊遗址出土陶范300余件,其中农具范占60%以上,出土铁农具200多件,占全部铁器的5%.这些考古资料证明战国中晚期 ( ) A. 铁器已开始用于农业生产 B. 铁农具的使用已很普遍 C. 铁器牛耕成为古代主要农耕方式 D. 铁农具制作技术臻于成熟
A.
B.
C.
D.
D
【简答题】此图是何种安装方式？此图何种安装方式？
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