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【单选题】
铰链四杆机构是按( )的不同形式分为曲柄摇杆机构、双摇杆机构、双曲柄机构这三种基本形式的。A.
摇杆
B.
连架杆
C.
连杆
D.
曲柄
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举一反三
【单选题】Equilibrium GDP in the short-run is determined at the point where:
A.
gross domestic production equals aggregate demanD.
B.
domestic production equals domestic consumption.
C.
imports equal exports.
D.
the rate of unemployment equals zero.
【单选题】The medicine the doctor gave him _____ his headaches.
A.
freed
B.
refreshed
C.
released
D.
relieved
【单选题】Equilibrium GDP in the short-run is determined at the point where:
A.
gross domestic production equals aggregate demand.
B.
domestic production equals domestic consumption.
C.
imports equal exports.
D.
the rate of unemployment equals zero.
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