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【单选题】
步进电动机在高频区工作产生失步的原因是{.XZ}。
A.
励磁电流过大
B.
励磁回路中的时间常数(T=L/R)过小
C.
输出转矩随频率f的增加而升高
D.
输出转矩随频率f的增加而下降
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举一反三
【简答题】阅读理解。 If you open today's newspaper, what do you see? Ads! Look through a magazine. More ads! Turn on the TV. Still more ads! Everywhere you look, someone has something to sell. Here are some ways ads...
【单选题】为缩短细菌培养的延迟期,菌龄应控制在
A.
潜伏期
B.
对数生长期
C.
稳定期
D.
衰亡期
【简答题】阅读理解。 Open today's newspaper. What do you see? Ads!Look through a magaine. More ads! Turn on the TV. Still more ads! Everywhere you look, someone has something to sell. Here are some ways ads get us t...
【简答题】阅读理解。 If you open today's newspaper, what do you see? Ads! Look through a magazine. More ads! Turn on the TV. Still more ads! Everywhere you look, someone has something to sell. Here are some ways ads...
【单选题】是正经别行深入体腔的支脉,既加强了十二经脉的内外联系,也加强了经脉所属络的脏腑在体腔深部的联系。具有以上特点的经脉的名称是( )
A.
十二经脉
B.
十二经别
C.
十二经筋
D.
十二络脉
E.
奇经八脉
【单选题】下列哪项线形的感觉单代表女装( )。
A.
直线
B.
弧线
C.
折线
D.
曲线
【单选题】是正经别行深入体腔的支脉,既加强了十二经脉的内外联系,也加强了经脉所属络的脏腑在体腔深部的联系。具有以上特点的经脉的名称是( )
A.
十二经别
B.
十二经筋
C.
十二络脉
D.
十二皮部
【单选题】《中小学心理健康教育指导纲要》的总目标决定了心理健康教育的主要形式只能是()
A.
心理健康教育课程
B.
一般学科教育课程
C.
心理咨询教育课程
D.
心理治疗教育课程
【单选题】是正经别行深入体腔的支脉,既加强了十二经脉的内外联系,也加强了经脉所属络的脏腑在体腔深部的联系。具有以上特点的经脉的名称是
A.
奇经八脉
B.
十二络脉
C.
十二经筋
D.
十二经别
E.
十二经脉
【单选题】What makes Twitters ads well-known?
A.
Ads writers would like to promote their own work.
B.
Professional ads writers have produced many creative ads.
C.
Many companies provide support since they can benefit from the ads.
D.
A lot of followers are willing to buy self-branding products.
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