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【单选题】
对某城市工业企业未安装设备进行普查,总体单位是A.
工业企业全部未安装设备 （ ）
B.
工业企业每一台未安装设备
C.
工业企业的未安装设备
D.
每一个工业企业
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反馈参考答案：
举一反三
【单选题】In a two-stroke engine the camshaft rotates at____ the engine rotational speed.
A.
half
B.
twice
C.
the same speed as
D.
four times
【单选题】Each cylinder in a two stroke cycle engine experiences combustion（）.
A.
once each crankshaft revolution
B.
twice each crankshaft revolution
C.
every other crankshaft revolution
D.
every fourth stroke
【单选题】In a two-stroke engine, there are always a series of openings known as , and in some circumstances, there are also openings known as , in the part of the cylinder liner.
A.
scavenging air ports; exhaust ports
B.
inlet ports; scavenging air ports
C.
scavenging air ports; inlet ports
D.
exhaust ports; inlet ports
【单选题】My grandfather is such a forgetful person that he has to _______ many things, even his daily meals. [ ]
A.
be remembered by
B.
be reminded of
C.
be memorized
D.
be reminded
【单选题】In two-stroke engine the crankshaft is connected with ____ by means of the connecting rod.
A.
the stuffing box
B.
the piston
C.
the crosshead
D.
guide plate
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