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【简答题】A growing body of evidence suggests that the most significant thing about college is not where you go, but what you do once you get there. Historian and educator Ken Bain 1 a road map for students in ...
【简答题】用所给词的适当形式填空。 1.She wants ______ (read) a book. 2. Let's go and ______ (see) our grandma. 3. Would you like ______ (have) a cup of tea? 4.She ______ (get) up at 6:30 in the morning. 5.Can he ______ (ri...
【多选题】下列关于真值表描述中正确的有
A.
真值表是列出了部分输入值组合及其对应输出值的表格
B.
真值表包括了全部可能的输入值组合及其对应的输出值
C.
真值表中的数值“0”和“1”表示实际大小
D.
真值表是一种表明逻辑门电路输入状态和输出状态对应关系的表格
【单选题】一台额定电压为220V的三相异步电动机定子绕组D接线,若启动时定子绕组改成Y接线,且接在380V的交流电源上,则电机的( )。
A.
启动转矩增大
B.
启动转矩减小
C.
启动转矩不变
【单选题】一台额定电压为220V的三相异步电动机定子绕组三角形接线,若起动时定子绕组改成星形接线,且接在380V的交流电源上,则电机的(  )?
A.
起动转矩增大
B.
起动转矩减小
C.
不一定
D.
起动转矩不变
【单选题】Go and get your book. It’s _____ you left it.
A.
that
B.
which
C.
what
D.
where
【单选题】有一台三相异步电动机,每相定子绕组额定电压为220V, 当接到线电压为380V的三相电源上时,此电动机要采用( )联结方法。 A Y形 B △形 C Y形或△形都可以 D 无法判断
A.
B.
C.
D.
D
【简答题】( )16—When will your new book _______? —It has not been decided yet. A.find out B.come out C.look up D.set up ( )17.—Mum.I did best in our group discussion today. —Well done! I ...
【简答题】(三) Parents are the first teacher of children. Mum and Dad—they're two of the most important people in your life. You p 1 see at least one of them every day and , over your life time, they're likely t...
【简答题】Budget airlines seem to be attractive and may reduce your travel cost a lot, but there are some things to note when you’ve taken a budget carrier. Use a flight aggregator such as Skyscanner, Kayak, Tr...
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