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【判断题】
双作用叶片泵是定量泵。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】A disadvantage of pursuing a low-cost strategy is that:
A.
it makes it difficult for firms to customize their product offerings .
B.
price wars make it hard to compete with differentiators.
C.
it costs more than a differentiation strategy because of the necessity of high capital investments.
D.
powerful buyers are a major threat.
E.
it reduces customer retention.
【单选题】向单元格键入数据或公式后,结果单击按钮"√" 则活动单元格会 ( ) 。
A.
保持不变
B.
向下移动一格
C.
向上移动一格
D.
向上移动一格
E.
向右移动一格
F.
向上移动一格
【单选题】Singaporeans believe that a lack of Chinese-speaking skills is a disadvantage in the 21st century.
A.
Y
B.
N
C.
NG
【单选题】向单元格键入数据或公式后,结果单击按钮"√" 则相当于按 ( ) 键。
A.
Del
B.
Esc
C.
Enter
D.
Enter
E.
F.
Shift
G.
Enter
【单选题】A disadvantage of fluid measuring is that＿＿。
A.
changes in quantity of fluid in rocks can be caused by other factors other than strain
B.
present scientific instruments are not able to provide precise measurement
C.
the electrical properties of the rock itself also change the
D.
fractures in these rocks are often so serious that accurate measurement is impossible
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