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【单选题】
Copyrights and related rights protect ______.A.
the rights of a novelist only when he is alive
B.
the rights of a novelist for no longer than 50 years after his death
C.
the rights of a music performer for his creative work
D.
the rights of radio program producers rather than those of radio stations
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举一反三
【单选题】If planned expenditures equal $13 trillion when real GDP is $13.5 trillion, then
A.
inventories will decrease by $0.5 trillion.
B.
actual investment will exceed planned investment.
C.
there will be excess demand for most goods.
D.
the economy must have a trade surplus to sell the excess goods and services.
【简答题】本证激发向半导体提供 ()
【判断题】There are two types of welding machine, AC welding machine and DC welding machine.
A.
正确
B.
错误
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