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【单选题】
时间分荧光免疫测定( TRFIA)是以镧系元素标记抗体或者抗体作为示踪物,并与时间分辨测定技术相结合,建立起来的一种新型非放射性微量分析技术。镧系元素作为示踪物的优点不包括A.
发光稳定
B.
荧光寿命长
C.
Stokes位移大
D.
激发光谱带较宽
E.
不易受到环境中镧系元素的污染
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【简答题】The Summer Mountain Resort is famous for mountains, but the real attractions lie in the lake area.
【简答题】阅读填空。 Last Sunday, my father, my mother and I (1) w_____ to a summer camp. We went to the mountains, then we (2) g_____ to the foot of the mountain (3) b_____ bus. In the middle of the mountain there ...
【判断题】The Meridian Gate has five openings with the central passage reserved for the emperor alone.
A.
正确
B.
错误
【简答题】The full name of the USA is ( ).
【简答题】The Meridian Gate, also known as _____________________(Five-phoenix Tower) is the main entrance to the Imperial Palace.
【判断题】The Meridian Gate has five gateways, and the central gateway is part of the Imperial Way.
A.
正确
B.
错误
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