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【单选题】
局域网的常用传输介质主要有()、同轴电缆和光纤。A.
双绞线
B.
激光
C.
微波
D.
红外线
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【简答题】Climate change connected with the reduction of wetlands at the source of the country's two longest rivers， the Yangtze and the Yellow， has reduced the volume of water flowing into them， scientists sai...
【单选题】Statistics show a 20% reduction in burglary _____with last year. [ ]
A.
compared
B.
comparing
C.
having compared
D.
having been compared
【简答题】在昼间,股道号码信号显示两臂向上直伸,表示是( )道股道号码信号。
【单选题】毒理学研究中提倡3R原则是指
A.
replacement/reduction/refinement
B.
replacement/recovery/refinement
C.
replacement/reduction/reference
D.
replacement/recovery/reactivity
E.
replacement/recovery/reference
【单选题】动物试验的“3R”原则不包括
A.
减少(reduction)
B.
优化(refinement)
C.
限制(restriction)
D.
替代(replacement)
【单选题】In paragraph 3, which of the following is NOT given as a reason for a reduction in death rates?
A.
New inventions.
B.
Better hygiene.
C.
Improved food production.
D.
Better control of fatal diseases.
【单选题】We are making a (n) ____ of 20% reduction in the price to all customers who place an order before May. [ ]
A.
service
B.
offer
C.
budget
D.
appointment
【简答题】在昼间，股道号码显示两臂向上直伸，表示是（）道股道号码信号。
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