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【单选题】
根据刮油环的作用，刮油环的结构和安装有以下特点________。I．环与缸壁接触面积小II．环自身弹性大III．环天地间隙小IV．环工作表面多为矩形V．双刀环之间有泄油孔VI．安装时刮刀尖端向下A.
I+III+V
B.
II+III+V+VI
C.
I+II+III+V+VI
D.
I+II+III+IV+V+VI
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举一反三
【单选题】In the market for reserves, when the federal funds rate is 3%, raising the discount rate from 5% to 6%
A.
lowers the federal funds rate.
B.
raises the federal funds rate
C.
has no effect on the federal funds rate.
D.
has an indeterminate effect on the federal funds rate
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