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当前学科:第三节电动机与变压器
题目:
单选
MR公司的M型有载分接开关,完成一个分接的操作时间为()s。
A . 2;
B . 3.5;
C . 4;
D . 5.3。
答案:
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推荐知识点:
Write down the numbers of the topic sentences in the following passages.①People who talk and sing to plants have no mental problems at all, according to an agricultural expert. ②“In fact, singing and talking to plants makes them grow better,” says Dr Braymar. ③The reason is quite simple. ④When we sing or talk to plants, we exhale(呼出) CO2 which plants need to survive (continue to live)and grow better. ⑤Plants absorb (take in) CO2 through their pores(小孔) during the sunlight hours and produce oxygen which people to survive. ⑥Singing and talking have good effect on plants, however, only during the daytime. ⑦Singing or talking at bedtime will not help plants to grow better or grow faster.
一侧声带癌已累及声带大部分或全长,向前达前连合,向后侵及声带突,或向上侵及喉室、室带,或向下累及声门下区,声带运动正常或受限者()。
下列哪项无助于呼吸衰竭病因()
下述不是胎位异常原因的是()
根据办税服务厅三类窗口的具体工作职能,设置相关工作岗位是()。
下列关于子宫动脉的描述,不正确的是()
真实储蓄
流行病学实验研究最重要的优点是()
硫化氢在有氧的情况下能腐蚀()。
有关摄影距离的叙述,错误的是()