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问题 单项选择题

用正交表L16(215)直接安排试验时，最多安排______个二水平因子。

A．2

B．16

C．15

D．任意

答案

参考答案：C

解析：正交表中p=15表示可以安排15个二水平因子的试验。

单项选择题

电磁波在真空中的传播速度是

A．3×105m/s

B．3×108m/s

C．3×1010m/S

D．3×106m/s

E．3×109m/s
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单项选择题

The nurse is preparing to care for a client diagnosed with catatonic schizophrenia. In anticipation of this client's arrival, what should the nurse do

A．Notify security.

B．Prepare a magnesium sulfate drip.

C．Place a specialty mattress overlay on the bed.

D．Communicate the client's nothing-by-mouth status to the dietary department.
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