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【单选题】
在CRH1A型动车组中，将DC1650V电压转换成频率及电压均可调节的三相AC电压进行驱动控制的是（）。A.
LCM
B.
MCM
C.
ACM
D.
直流环节
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【单选题】There are months in a year. December is the____________month of the year.
A.
twelve; twelve
B.
twelve; twelfth
C.
twelfth; twelveth
【简答题】选择合适的单词填空。 four piano season twelve swim 1. There are months in a year. 2. My favourite is winter. 3. There are seasons in a year. 4. I often play the on the weekend. 5. I can in summer...
【简答题】There are twelve months in a year. In the twelve months, February has twenty-eight days. In a leap year (闰年), it has twenty-nine days. A leap year comes every four years. The rest eleven months have t...
【单选题】提示承兑是指( )。
A.
提示承兑是指持票人向出票人出示汇票，并要求付款人承诺付款的行为
B.
提示承兑是指持票人向收款人出示汇票，并要求付款人承诺付款的行为
C.
提示承兑是指持票人向付款人出示汇票，并要求付款人承诺付款的行为
D.
提示承兑是指出票人向持票人出示汇票，并要求付款人承诺付款的行为
【单选题】There are months in a year. October is the month.
A.
twelve; ten
B.
twelfth; tenth
C.
twelve; tenth
D.
twelfth; ten
【单选题】There are months in a year. December is the month of the year.
A.
twelve; twelve
B.
twelve; twelfth
C.
twelfth; twelve
D.
twelve; twelveth
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