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问题 单项选择题

一般甜面包在面坯重量为60克时，其烤炉温度一般设置在下火180℃，上火160℃左右，烘烤时间设置在（）。

A、5分钟左右

B、10分钟左右

C、20分钟左右

D、30分钟左右

答案

参考答案：B

单项选择题

Sequential circuit is a common logic device whose output values, at a given instant, depend upon its input values and the internal state at that instant, and whose internal state depends upon the (66) preceding input values and the preceding internal state. A sequential circuit can assume a finite number of internal states and may therefore be regarded, from an abstract (67) , as a finite (68) .

Combinational circuit is another logic device whose output values, at any given instant, depend upon the input values at that instant. A combinational circuit is a (69) of a sequential circuit whose internal state is not taken (70) .

（66）处填（）。

A．directly

B．immediately

C．instantly

D．snapshot
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单项选择题 B1型题

成熟B细胞的标志是（）。

A.IgG

B.IgA

C.IgM

D.IgD

E.IgE
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