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【简答题】
褐飞虱( )翅型成虫具有远距离( )特性。
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【单选题】Nowadays sled dogs are still necessary when ______.
A.
there are severe weather conditions
B.
flying machines are full with passengers
C.
snow machines use up power in the Arctic region
D.
people need partners during the travel
【简答题】累积增长量等于相应各时期的逐期增长量之（）。
【判断题】Nowadays,more and more people like to travel, when they travel, they may hitchhike.
A.
正确
B.
错误
【简答题】Nowadays, it is possible to travel to distant parts of the globe in several hours. This can result in the traveler ending up in a part of the world where time is different from his or her own “body cl...
【单选题】累计增长量与逐期增长量的关系是（ ）。
A.
累计增长量等于相应的逐期增长量之和
B.
累计增长量等于相应的逐期增长量之差
C.
累计增长量等于相应的逐期增长量之乘积
D.
累计增长量等于相应的逐期增长量之商
相关题目：
【判断题】Nowadays,more and more people like to travel, when they travel, they may hitchhike.
A.
正确
B.
错误
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