题目内容

为什么共轭效应存在长使一些基团的振动频率较低,而诱导效应常使一些基团的振动频率增加?

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来到石头城,阿卜杜拉看到有个人坐在石凳上,他的左臂上挂着金链子,链子上有()把钥匙。

The heated feedwater entering any flash chamber of a flash-type evaporator will()

A. vaporize, with the unflashed water remaining at the temperature at which it entered the flash chamber
B. vaporize, with the unflashed water equalizing to the saturation conditions existing in the flash chamber
C. vaporize, with the remaining water at the temperature greater than it entered the flash chamber
D. boil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber

多元文化教育的实施需要另设有一门学科,将少数民族文化或外来文化资产纳入现有的课程中。

A. 正确
B. 错误

由于数控机床的加工精度较高,所以在确定加工路线时,首先应考虑加工路线尽量短,其次再考虑加工精度。

A. 正确
B. 错误

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