皮皮学，免费搜题
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【单选题】
车用汽油发动机喷射系统按喷射部位的不同可分为A.
连续喷射和间歇喷射
B.
缸内喷射和缸外喷射
C.
分组喷射和顺序喷射
D.
间歇喷射和分组喷射
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皮皮学刷刷变学霸
举一反三
【单选题】An organizational structure that contains only line positions and no staff positions is referred to as a _____ organization.
A.
line
B.
staff
C.
line-and-staff
D.
tall
【单选题】An organizational structure that contains only line positions and no staff positions is referred to as a _____ organization.
A.
line
B.
staff
C.
line-and-staff
【单选题】A combination of corrosion and erosion caused wastage in the main ballast line，which directly led to the leak ______．
A.
draff
B.
wastage
C.
mullock
D.
obsolete
【单选题】The runners________ several times ________their positions on the starting line, otherwise they will be kicked out.
A.
are warned, making up
B.
warn, to make up
C.
have been warned, to take up
D.
warn, to have taken up
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