单项选择题

Under the direstion of the surgeon，the instrumentation can be （）.

A.controlling
B.controls
C.controlled
D.control

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单项选择题
In may require long period of mechanical ventilation for （）.

A.surviving
B.survival
C.survive
D.survived
判断题
In order to formulate effective strategies, a firm usually goes through a process frequently called strategic management process .()
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