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【单选题】
It is indicated by 'kidnapping has become big business in many parts of the world' that ______A.
kidnapping has become the most profitable business in many parts of the world
B.
there is a worldwide increase in kidnappings and many groups have make profits in kidnaps
C.
by kidnapping the kidnappers have established their corporations in many parts of the world and earn big money each year
D.
in many parts of the world more people have become kidnappers
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举一反三
【简答题】The term“Hippies”refers to
【单选题】提高普通光学显微镜的分辨能力,常用的方法有
A.
利用高折射率的介质（如香柏油）
B.
调节聚光镜，加红色滤光片
C.
用荧光抗体示踪
D.
将标本染色
E.
增加目镜放大倍数