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问题 单项选择题

立体声和单声道相比，具有以下的特点，（）是错误的描述。

A.不具备声源的分布感，更集中

B.具有各声源的方位感

C.提高了信息的清晰度和可懂度

D.提高节目的临场感、层次感和透明度

答案

参考答案：A

单项选择题

The town of Greenfield recently instituted a substantial supplementary tax on all households, whereby each household is taxed in proportion to the volume of the trash that it puts out for trash collectors to pick up, as measured by the number of standard-sized garbage bags put out. In order to reduce the volume of the trash on which their tax bill is based, Greenfield households can deliver their recyclable trash to a conveniently located local commercial recycling center, where such trash is accepted free of charge.
The supplementary tax provides some financial incentive to Greenfield households to do each of the following EXCEPT

A．sort out recyclable trash thoroughly from their other trash.

B．dump nonrecyclable trash illegally at parks and roadsides.

C．compress and nest items of nonrecyclable trash before putting them out for pickup.

D．deliver recyclable materials to the recycling center instead of passing them on to neighbors who want to reuse them.

E．(E) buy products without packaging or with recyclable rather than nonrecyclable packaging.
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单项选择题

当病人输入大量库存血后容易出现

A．低血钾
B．高血钾
C．低血钠
D．高血钙
E．高血铁
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