【单选题】【消耗次数：1】
11.The United Nations managed to ______millions of people from hunger last year.
①
preserve
②
sell
③
save
④
. buy
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相关题目
【单选题】
No more having to buy expensive textbooks which you will only use for a year or two and then sell or _______ away.
①
get
②
give
③
take
④
gain
【单选题】
11.The children were ______their father.
①
part from
②
parted with
③
parted in
④
parted from
【单选题】
These children are _________ this year than they were last year.
①
moretall
②
moretaller
③
verytaller
④
muchtaller
【单选题】
These children are ______ this year than they were last year.
①
more tall
②
more taller
③
very taller
④
much taller
【单选题】
These children are_______this year than they were last year.
①
moretall
②
moretaller
③
verytaller
④
muchtaller
【单选题】
Niagara Falls is a great tourist _____, drawing millions of visitors every year.
①
attention
②
attraction
③
appointment
④
arrangement
【单选题】
9. These children are ____this year than they were last year.
①
more tall
②
more taller
③
very taller
④
much taller
随机题目
【单选题】
要改变电容分相式单相异步电动机的转向，应________。
①
调换电机的二根进线
②
调换工作绕组的始末端二根进线
③
同时调换工作绕组、起动绕组的始末端二根进线
④
起动时将电机的转子反向拨动一下
【单选题】
三相异步电动机带载工作时，其转子绕组上?电流。
①
A．由于无外部电源给转子供电，故无电流
②
B．由于有外部电源给转子供电，故有电流
③
C．由于无电磁感应，故无电流
④
D．由于有电磁感应，故有电流
【简答题】
自耦变压器的特点有哪些？
【简答题】
两台三相异步电动机的电源频率为50Hz，额定转速分别为1440r/min和2910r/min，则它们的磁极数分别是多少？额定转差率分别是多少？
【简答题】
电气传动系统的运动方程可看出：T>TL时，系统处于[填空]运动过程。