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【多选题】
差动式热继电器具有( )A.
断相保护
B.
过载保护
C.
短路保护
D.
欠压保护
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举一反三
【单选题】I'll never forget that terrible accident _____ it happened so long ago. [ ]
A.
only if
B.
even though
C.
only when
D.
ever since
【简答题】When someone says, “Well, I guess I'll have to go to face the music,” it doesn’t mean he is planning to go to a concert. It is something far less pleasant, like being called in your boss to explain wh...
【简答题】PDAs are very useful．They are like small computers．You can put a lot of information into them． For example．you can put in telephone numbers and e-mail addresses．Many people use PDAs to remember import...
【简答题】阅读理解。 PDAs are very useful. They are like small computers. You can put a lot of information into them. For example, you can put in the telephone and e-mail addresses. Many people use PDAs to remember ...
【单选题】采购货物已入库,估计发票账单本月不可到达, 本月应做的凭证( )。
A.
借：库存商品 （暂估价） 贷：应付账款/暂估应付款 （暂估价）
B.
借：库存商品 （-暂估价） 贷：应付账款/暂估应付款 （-暂估价）
C.
借：在途物资 应交税费—应交增值税（进项税额） 贷：应付账款
D.
借： 库存商品 贷：在途物资
【单选题】CRH2A统型动车组的控制电源是由（）供电的。
A.
稳定单相AC100V系统
B.
非稳定单相AC100V系统
C.
稳定DC100V系统
D.
稳定三相AC400V系统
【简答题】This is not the world we know. This world is controlled by computers. Men and women can be seen, but they are following the orders given to them by machines. The machines were designed by mad scientis...
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