【判断题】发生拉曼散射的结果将导致WDM系统中短波长通路产生过大的信号衰减,从而限制了通路数。
【单选题】The text suggests that early settlers in New England ______.
A.
were mostly engaged in political activities
B.
were motivated by an illusory prospect
C.
came from different intellectual backgrounds.
D.
left few formal records for later reference
【单选题】Early settlers_______ their survival _______ hard work and determination to succeed.
【单选题】Early settlers believe that a sunken body could be located by casting into a stream ______.
B.
a bandanna that had been worn by a drowned man
D.
a bandanna that had been blessed
【简答题】Both the early European settlers and the Aborigines had to______about natural products of Australia.
【单选题】In the early period, European settlers resorted to deceit and even war to deal with ______ who inhabited the American continent earlier than them.
【判断题】The early settlers in the colony discovered a way to make money by growing tobacco. ()
【判断题】职业证书并非多多益善,大学生应结合自己的职业规划,考取具有竞争力的执业证书。()
【单选题】Early settlers usually moved their belongings west in wagon trains.