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问题 单项选择题

下列99mTc标记显像剂中，下列哪一种显像剂一般情况下不用于核素心血管造影（）。

A.99mTcO4-

B.99mTc-HAS

C.99mTc-DTPA

D.99mTc-MIBI

E.99mTc-HAM

答案

参考答案：E

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Louis Braille, a Frenchman, couldn’t see anything when he was three years old. At the age of ten, he went to a special school for b小题1:children. The teacher there taught him a new w小题2:of reading by touching raised letters(字母) on the paper. H小题3:, it was slow way to read, and it did not help the blind write. In 1819, a French soldier invented a special writing c小题4:“night writing”. Night writing used twelve dots(小圆点). In 1824, Braille knew about the night writing and b小题5:to change it for the blind to use. He didn’t use 12 dots but s 小题6: dots. Letters are made with one or more dots. In this way, Braille was a  小题7:to use the six dots for all twenty-six letters. Now people call this writing the “Braille Writing” and people first used it in 1829. F 小题8: then on, many blind people from all over the world used it. Before this writing a 小题9:, the blind could not read or write. Many of them lived in hospitals and knew n 小题10:about the world outside. His work helped them see the world through their fingers.
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所有用于电式测量的仪器仪表，统称为（）。对于各种仪表。不论质量如何，它的指示值和被测量的实际值之间总是存在着某种程度的差别，这种差别就叫作（）。
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