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【单选题】
某物体长度约为2厘米,为使测量结果有5位有效数字,用的测量仪器是:
A.
米尺
B.
20分度游标卡尺
C.
50分度游标卡尺
D.
千分尺
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举一反三
【单选题】Sludge may form in the crankcase of an air conditioning compressor as a result of ______.
A.
bubbling refrigerant
B.
overheating and oxidation
C.
lowered operating temperatures
D.
reducing the cloud or floc point
【单选题】Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of ()
A.
refrigerant bubbles in the lube oil
B.
refrigerant reducing the lube oil viscosity
C.
oxidation of the lube oil from overheating
D.
reducing the floc or cloud point of the oil
【判断题】一般婚礼的礼金为双数
A.
正确
B.
错误
【单选题】The lengthening of a crack formed in the shell plating of a ship may be prevented by _____.
A.
welding brackets across both ends of the crack
B.
chipping out and slot welding the entire crack
C.
drilling a hole at each end of the crack
D.
cutting a square notch at each end of the crack
【单选题】Which harmful consequence may be the result of lube oil sludge accumulation? .
A.
Clogged oil pump suction screens
B.
Increased oil operating temperatures
C.
Sticking piston rings
D.
All of the above
【单选题】In both FPP and MMP systems government may not be formed based on a majority voter mandate.
A.
B.
C.
NOT GIVEN
【单选题】Sludge may form. in the lubricating oil crankcase of a reciprocating air conditioning compressor as a result of ______.
A.
wax precipitation in the lube oil
B.
contamination by dust, scale, or moisture
C.
refrigerant bubbles in the lube oil
D.
refrigerant reducing the lube oil viscosity
【单选题】Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of_____.
A.
refrigerant bubbles in the Iube oil
B.
refrigerant reducing the lube oil viscosity
C.
oxidation of the lube oil from overheating
D.
reducing the floc or cloud point of the oil
【单选题】本地服务器测试时,要使用本地域名,请选择正确的本地域名
A.
loclahost
B.
locahost
C.
loclhost
D.
localhost
【单选题】Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of ______.
A.
refrigerant bubbles in the lube oil
B.
refrigerant reducing the lube oil viscosity
C.
oxidation(氧化) of the lube oil from overheating
D.
reducing the floc or cloud point of the oil
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