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【简答题】
何谓溢流阀的开启压力和调整压力 ? 液压系统中为什么要设置背压回路?背压回路与平衡回路有何区别?
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举一反三
【单选题】Mr. Baker sent his son to the doctor ______ an X-ray check.
A.
gives
B.
to give
C.
being given
D.
to be given
【单选题】How often does the woman go to the doctor for a check-up?
A.
Once every year.
B.
Twice a year.
C.
Once every three years.
【单选题】After check up,my doctor ______ some medicine for me.
A.
prescribed
B.
persuaded
C.
persisted
D.
permitted
【单选题】The doctor is going check Julian’s _______ .
A.
vital signs
B.
strength
C.
performance
【单选题】The doctor ______ and found there was something wrong with his eyes. [ ]
A.
looked him after
B.
checked him over
C.
checked him about
【简答题】A．They may have a talk with the doctor. B．They may check the symptoms against the guideline. C．They may have a physical examination in the hospital. D．They may answer the questions in the Web site of ...
【单选题】下列可用于将hello.c编译生成可执行程序hello的是( )。
A.
gcc -o hello hello.c
B.
gcc -c hello.c
C.
gcc -S hello hello.c
D.
gcc -C hello hello.c
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