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【单选题】
关于电感的品质因数Q说法不正确的是（ ）。A.
电感 Q 值越高，越强 。
B.
电感的损耗电阻就是直流电阻
C.
电感 Q 值定义为 w L/R，其中： w 为工作角频率，L为电感量，R为损耗电阻。
D.
电感 Q 值越高，功率损耗越小。
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举一反三
【单选题】Which of the following items is included in the M2 definition of the money supply? ( )
A.
credit cards
B.
money market mutual funds
C.
corporate bonds
D.
large time deposits
【单选题】Which of the following is NOT included as a component of the M1 definition of money?
A.
bonds
B.
checkable deposits
C.
coins and bills held by the nonbank public
D.
all of the above
E.
none of the above
【单选题】She got down from the bus, with her bag ______ on the seat.
A.
left
B.
leaving
C.
leave
D.
forgot
【简答题】A．She fell down. B．She was knocked down by others. C．She got a seat. D．She was taken care of by the two young guys.
【简答题】牡丹和芍药如何区别？
【单选题】Which of the following is not included as a component of the M1 definition of money?
A.
bonds
B.
checkable deposits
C.
coins and bills held by the nonbank public
D.
all of the above
E.
none of the above
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