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【单选题】
下图为 “ 我国南方某河流流域示意图 ” 。 对图示河流的水文特征描述错误的是 ( )A.
河流年径流量较大
B.
河流的汛期较长，主要集中于夏季
C.
冬季有结冰期，含沙量较小
D.
河水以雨水补给为主
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举一反三
【单选题】Lawrence Craven, a doctor from the USA, is the author of several published reports, one of which introduced the idea in 1953 ________ aspirin could reduce the risk of heart attacks by thinning blood.
A.
when
B.
where
C.
that
D.
which
【简答题】试述出入境强制措施的执行程序?
【简答题】二极管是用一个PN结制成的半导体器件,它的最基本性质是 ,硅管的死区电压和正向压降比锗管 的 ,而反向饱和电流比锗管的 得多。
【单选题】What's the author's attitude towards the Asian flu? ______.
A.
He simply reports the disease objectively
B.
He is worried about the spread of the disease
C.
He is disappointed at the tests of the London doctors
D.
He believes that the disease will soon be controlled
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