53.如果要对硬盘进行逻辑分区,目前只能使用Windows和Dos提供的Fdisk来实现。
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Whichoftheseactionsdoesahydrauliccylinderperform?
A. pushing
B. lifting
C. bothA.andB.
D. noneoftheabove
Leakageinahydrauliccylinderispreventedby
A. seals
B. cylinderhead
C. cylindercap
D. noneoftheabove
Forasingleactingactuator,thepistonrecoversby
A. springforce
B. load
C. bothoftheabove
D. noneoftheabove
Whendoesaspringtypesingleactingactuatorrecover?
A. oilforceismorethanspringforce
B. oilforceislessthanspringforce
C. oilforceandspringforcearesame
D. noneoftheabove
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