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【单选题】
对于极微量(ng水平)抗原的检测，首先可考虑使用A.
反向间接血凝法
B.
荧光抗体技术
C.
放射免疫测定
D.
ELISE法
E.
单向免疫扩散
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【简答题】The fourth round of heavy smog to hit Beijing in four weeks has sent more people to the hospital with respiratory (呼吸的) illnesses and led to calls for laws to control the pollution. Pan Shiyi, a celeb...
【单选题】听力原文： The United Nations has warned of a looming catastrophe in Somalia where more than 200,000 people have fled their homes to escape the fighting in the capital Mogadishu. A UN official said that mo...
A.
20,000.
B.
200,000.
C.
2,000,00(1.
D.
20,000,000.
【多选题】温带地区土壤肥沃的原因包括
A.
冰川磨碎了流经区域下面的岩石
B.
枯枝落叶在缓慢地发生腐变
C.
动物经常的在森林里穿梭促进了植物生长
D.
较少的降雨可以将营养物质慢慢渗入地层
【单选题】The oceans are about to be explored because______.
A.
marine life has more medical value than land life
B.
human beings have the right to explore the nature
C.
they are unknown and mysterious to human being
D.
the exploration will bring great economic benefits
【简答题】The fourth round of heavy smog to hit Beijing in four weeks has sent more people to the hospital with respiratory（呼吸的） illnesses and led to calls for laws to control the pollution. Pan Shiyi, a celebr...
【简答题】( )也称公开密钥证书或称为数字凭证、数字标识,是一个经证书认证机构数字签名的、包含用户身份信息以及公开密钥信息的电子文件。
【单选题】There _____ more roads, trees and tall buildings in Beijing in 2008. [ ]
A.
will has
B.
is going to have
C.
will be
D.
is going to has
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