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二元函数f(x，y)在点(xo，yo)处的下面4条性质：(I)连续；(Ⅱ)两个偏导数连续； (Ⅲ)可微；(Ⅳ)两个偏导数存在，则()．

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在两级成本核算体制下，“厂部基本生产成本明细账”应按()设置专栏。

A. 成本项目
B. 费用明细项目
C. 生产车间
D. 产品名称

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"Club feet" (Line 1, Para. 1) probably means______.

A. big feet
B. one foot
C. deformed feet
D. feet without toes

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"'Ancient saying"(Line 1 , Para. 4) is the equivalent to ______.

A. maxim
B. slogan
C. slang
D. proverb

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Which of the following is NOT TRUE？

A. The traffic police in London can be very busy.
B. The traffic in some parts of London is very heavy.
C. On average Mark Hill is on duty four hours a day.
D. Cyclists are not allowed to use the motorways.

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