单项选择题

大气层又叫大气圈，地球就被这一层很厚的大气层包围着。下列关于大气层的说法中，正确的一项是( )。

A．大气层的厚度大约为700千米
B．云、雾、雨等现象都发生在暖层内
C．大气层的气温随高度增加而降低
D．大气层的空气密度随高度的增加而减小
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单项选择题
The total cost connected （） the reconditioning of the goods amounts to US $1 000.

A. for
B. from
C. with
D. within
单项选择题
Any dispute arising from duty payment between the auditee and the Customs should be dealt with in accordance with the provision laid down in the
A．regulations on Customs External Auditing of the peopli's Republic of China
B．customs law of the People~ Republic of China
C．regulations on Import and Export Tariff of the People~Republic of China
D．Both B and C
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