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【单选题】
三相异步电动机的调速方法有改变频率、改变极对数和( )。A.
降压调速
B.
弱磁调速
C.
改变转差率
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举一反三
【单选题】听力原文：M: Hi, Susan. Where were you at lunch time? I was saving a seat for you in the canteen. W: Oh, sorry to miss you. But my thirst for knowledge was greater than my hunger for food. M: Ha. I never h...
A.
Giving a lecture.
B.
Discussing physics problems.
C.
Waiting for a friend.
D.
Reading twentieth-century literature.
【简答题】Bullet journaling club Do you want to organize your life? Start a bullet journal! Bullet journaling has ben descibed as " the og tool for the digital age". What's more , it looks beautiful, it's f...
【单选题】听力原文：M: Hi, Janet. Where were you at lunchtime? I was saving a seat for you in the cafeteria. W: Oh! Sorry to miss you. But my thirst for knowledge was greater than my pains of hunger! M: I've never h...
A.
Giving a lecture.
B.
Discussing political science.
C.
Working on a science problem.
D.
Reading twentieth-century literature.
【单选题】听力原文：M: Hi, Susan. Where were you at lunch time? I was saving a seat for you in the canteen. W: Oh, sorry to miss you. But my thirst for knowledge was greater than my hunger for food. M: Ha. I never h...
A.
Giving a lecture.
B.
Discussing physics problems.
C.
Waiting for a friend.
D.
Reading twentieth-century literature.
【单选题】听力原文：M: Hi, Susan. Where were you at lunchtime? I was saving a seat for you in the cafeteria. W: Oh, sorry to miss you, but my thirst for knowledge was greater than my pangs of hunger. M: I never had ...
A.
In the late rooming.
B.
Immediately after lunch.
C.
In the mid-afternoon.
D.
After the evening meal.
【简答题】Bullet journaling club Do you want to organize your li fe? Start a bullet journal! Bullet journaling has been described as “ the og tool for the digital age ” . What's more , it looks beautiful , ...
【简答题】Read the passage. Choose the best answer. Bullet journaling club Do you want to organize your life? Start a bullet journal! Bullet journaling has been described as "the og tool for the digital age...
【单选题】Where were you at lunch time? I a seat for you in the dining hall.
A.
saved.
B.
was saving .
C.
have saved.
D.
had saved.
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