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【单选题】
乙脑的流行环节中蚊子是A.
传染源
B.
中间宿主
C.
储存宿主
D.
传播媒介和储存宿主
E.
传染源和储存宿主
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举一反三
【单选题】Today's college students have ambiguous feelings about the role they should play in the world.
A.
wonderful
B.
unusual
C.
ambitious
D.
doubtful
【简答题】Among all the American states, Rhode Island is the smallest one, _____________is the largest one.
【单选题】FTP 服务器在 standard 模式下,通过( )进行数据传输。
A.
TCP 20 端口
B.
TCP 21 端口
C.
TCP 22 端口
D.
TCP 23 端口
【判断题】In the United States, Medicare provides virtually free treatment for all American citizens.
A.
正确
B.
错误
【单选题】The author believes that today's astronomy students
A.
are much brighter than students of a generation ago.
B.
no longer care about astronomical facts.
C.
are better-informed about the unseen worlds of space.
D.
may learn more about man and his research in various fields through the study of astronomy.
【简答题】All American states require young people to attend school and every child in America is guranteed to ______ years of education.
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