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【单选题】
关于旋风除尘器,说法正确的是:A.
通常只能去除2.5μm以上的固体颗粒
B.
通常只能去除5μm以上的固体颗粒
C.
通常只能去除10μm以上的固体颗粒
D.
通常只能去除30μm以上的固体颗粒
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反馈参考答案：
举一反三
【单选题】How did Steve Jobs make the Apple Store the golden standard in customer service?
A.
There are no cashiers in an Apple Store.
B.
Apple learns from an elegant hotel.
C.
Apple develops meaningful relationships with customers.
D.
A concierge is at your service in every Apple Store.
【简答题】How did Apple Inc. perform in the stock market upon Jobs's comback?
【简答题】How many employees are there in Apple Inc. worldwide?
【简答题】At what age did Jobs found Apple Inc.? Where was it based?
【单选题】Leonard Hayflick believes that aging can be treated, so lifespan can be increased.
A.
True
B.
False
【单选题】-__________ do you spell it? -__________, apple. [ ]
A.
How; A-double P-L-E
B.
How; a- double P-L-E
C.
Wha t; A-double P-L-E
【单选题】—_______ do you spell it? —_______, apple. [ ]
A.
How; A-double P-L-E
B.
How; a- double P-l-e
C.
What; A-double P-L-E
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