【单选题】A light sleeper is usually very ______ to any sound even as inaudible as the humming of a mosquito.
【单选题】Heat damage to fuel injection nozzles can be prevented by avoiding ____.
A.
excessive fuel oil temperature
B.
long periods of engine overload
C.
metallic contact between nozzles and cylinder heads
D.
hard carbon deposit and varnish on the nozzles
【单选题】铣削箱体剖分面时,必须限制的自由度是:( )
【单选题】Beethoven knew that he was going deaf ________.
A.
when he could not hear himself humming a tune
B.
when he heard a humming noise
C.
when the humming noise grew louder
D.
when the doctor told him
【单选题】在计算机网络传输介质中,双绞线分为( )两种.
【单选题】对于语句:int *pa[5];的描述中,____是正确的。
A.
pa是一个指向数组的指针,所指向的数组是5个int型元素;
B.
pa是一个指向某数组中第5个元素的指针,该元素是int型变量;
D.
pa是一个具有5个元素的指针数组,每个元素是一个int型指针。
【单选题】Excessive vibration in an operating diesel generator may be caused by _____.
B.
surging at governed RPM
C.
loose engine mounting bolts
D.
coolant leaking into the cylinder