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【单选题】
刚体绕一定轴作匀变速转动时，刚体上距转轴为r的任一点的【图片】A.
切向加速度的大小和法向加速度的大小均不随时间变化
B.
切向加速度的大小和法向加速度的大小均随时间变化
C.
切向加速度的大小恒定，法向加速度的大小随时间变化
D.
切向加速度的大小随时间变化，法向加速度的大小恒定
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【简答题】阅读理解。 The Dragon Boat festival is known as dragon-boat racing (龙舟赛). Dragon-boat racing is the most popular activity during the festival, especially (尤其) in South China. A dragon boat looks like a dra...
【单选题】At the moment she is ______ the netball match between the Japanese team and the Cuban team over at the playing field.
A.
arbitrating
B.
intervening
C.
refereeing
D.
deciding
【单选题】A U.S. military airplane followed the boat because ______.
A.
the boat was on a erous voyage
B.
the boat was from an enemy country
C.
the boat looked like a ship from an unknown country
D.
it was the effect that the director wanted
【简答题】____ Cuban boat people___ would be an inhumane action.
【单选题】There are many _____ for visitors to the beach. [ ]
A.
ride boat
B.
boat ride
C.
boat rides
D.
the boat rides
【单选题】某投保人为自己价值10万元的财产，向X保险公司投保了保险金额为5万元的财产损失保险；同时，又以该财产向Y保险公司投保了保险金额为20万元、保险责任相同且保险期间相同的财产损失保险。该承保方式为（ ）。
A.
共同保险
B.
重复保险
C.
足额保险
D.
定值保险
【单选题】One of the most popular places in Cuban Miami is a restaurant called Versailles, which also has lots of mirrors on its walls. It has been on Eighth Sweet and Thirty-Fifth Avenue for many years and sha...
A.
The blurred images reflected on the windows.
B.
The number of French customers.
C.
The expensive Cuban food.
D.
The walls of mirrors.
【单选题】What are the attitudes of the local residents?
A.
They protested against detaining boat people.
B.
They protested against letting them stay forever.
C.
They urged Vietnam to accept the boat people.
D.
They urged Britain to accept the boat people.
【单选题】某投保人为自己价值10万元的财产，向x保险公司投保了保险金额为5万元的财产损失保险；同时，又以该财产向Y保险公司投保了保险金额为20万元、保险责任相同且保险期间相同的财产损失保险。该承保方式为（）。
A.
共同保险
B.
重复保险
C.
足额保险
D.
定值保险
【简答题】The Cuban Missile Cr
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