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问题 单项选择题

地壳中含量最多的金属元素（）

A.氧

B.硅

C.铝

D.铁

答案

参考答案：C

多项选择题

使加热器破坏，造成水位高的原因有（）。

A、疏水调节阀不正常运行或失常；

B、加热器之间压差不够；

C、超负荷运行；

D、高加泄漏。
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单项选择题

An analyst does research about cash flow statement and gathers the following information about an IT company (in millions).

Cash at the beginning of 2011 $490
Cash at the ending of 2011 $505
Cash flows from operating activities in 2011 $32
Cash flows from investing activities in 2011 $30
Which of the following transactions, on its own, best explains the change in cash flows from the beginning of the year The company:（）

A. issued $47 millions in bonds in 2011.

B. repurchased $47 millions of its stock in 2011.

C. increased long-term assets by $47 millions in 2011.
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