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【单选题】
在萃取时,可利用 ,即在水溶液中先加入一定量的电解质(如氯化钠),以降低有机物在水中的溶解度,从而提高萃取效果。A.
络合效应
B.
盐析效应
C.
溶解效应
D.
沉淀效应
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he was not caring about the killing
B.
he was frightened to hear what the writer said
C.
he thought the writer was a criminal
D.
he thought the writer was crazy
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【多选题】中日战争进入战略相持阶段后,日本在坚持灭亡中国的总方针下调整侵华政策,对国民党政府采取( )的方针。
A.
军事打击为主
B.
政治诱降为辅
C.
政治诱降为主
D.
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E.
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【单选题】听力原文：Mr. Wen said government would aim for a growth rate of 7 percent this year, considerably slower than the 9.1 percent pace recorded for 2003. He said the government would re duce the issuance of s...
A.
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B.
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C.
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D.
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【简答题】Read the dialogue between Anna and Olaf and answer the question: Anna looked at Olaf. He was dripping from head to toe! “ Olf, you ’ re melting! ” she cried. “ Some people are worth melting for, ” he ...
【多选题】根据交强险有关规定,发生下列情形导致交通事故,造成受害人财产损失的,保险公司不承担赔偿责任( )。
A.
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B.
驾驶员违反道路交通安全法的
C.
被保险机动车被盗抢期间肇事的
D.
被保险人故意制造道路交通事故的
【单选题】How would a man from Germany signify number two with his fingers?
A.
Holding up his ring finger and index finger
B.
Holding up middle finger and index finger
C.
Holding up his thumb and little finger
D.
Holding up his thumb and index finger
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