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【判断题】
通入励磁绕组的电流 U f 与通入控制绕组的电流 U C 相位上彼此相差 18 0 0 ,并且幅值 相等,这样的两个电流称为 两相对称电流 。
A.
正确
B.
错误
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参考答案:
举一反三
【单选题】When 20,000 units are produced, fixed costs are $16 per unit. Therefore, when 16,000 units are produced, fixed costs will ________.
A.
increase to $20 per unit
B.
remain at $16 per unit
C.
decrease to $10 per unit
D.
total $160,000
【判断题】The unit is a process-going course.
A.
正确
B.
错误
【单选题】Unit 03-2.mp3: W here are they going to?
A.
T he hotel
B.
T he office
C.
T he workshop
【简答题】由于我国多燃煤,煤炭中含有大量的硫化物,所以我国的酸雨大都是()酸雨。
【单选题】语法运用。 We are going to learn Unit ____.
A.
Six
B.
the Sixth
C.
Sixth
【单选题】We are going to learn Unit__________.
A.
Six
B.
the Sixth
C.
Sixth
【单选题】【C16】
A.
is going to be
B.
was about to be
C.
was to be
D.
was doomed to be
【单选题】The girl _______ 16 years old next week.
A.
is going to
B.
will be
C.
be
D.
was
【单选题】原子吸收法分析法选择性好是因为
A.
原子化效率高
B.
光源发出的特征辐射只能被特定的基态原子所吸收
C.
检测器灵敏度高
D.
原子蒸气中基态原子数不受温度影响
E.
光源的能量高
【单选题】Unit 02-5 W here are they going to?
A.
S hop
B.
W orkplace
C.
W orkshop
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