单项选择题

OpenCV中，下列函数能够实现颜色空间转换的是（）。 A. cv2.cvtColor( ) B. cv2.GaussianBlur( ) C. cv2.Canny( ) D. cv2.addWeighted( )

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单项选择题

Put the following four sentences into the right order so that it conforms to the rhetorical structure of the opening of a research paper?
a. In recent years, there has been an increased awareness of the potential impact of pollutants such as heavy metals.
b. Moreover, the traditional methods for treating aqueous streams containing metal contaminants are expensive and can have inadequate facilities.
c. The use of biological materials is one such technology which has received considerable attention.
This has led to the use of alternative technologies.

A．dabc
B．cbad
C．cabd
D．bacd

单项选择题

神经-肌接头传递中，消除乙酰胆碱的酶是
A、磷酸二酯酶
B、腺苷酸环化酶
C、胆碱酯酶
D、ATP酶
E、胆碱乙酰化酶