试题与答案

下列对于仪器最佳条件选择的描述中,错误的一项是() A.仪器是否处于最佳工作状态 B

题型:单项选择题 A1型题

题目:

下列对于仪器最佳条件选择的描述中,错误的一项是()

A.仪器是否处于最佳工作状态

B.显像检查前必须确定采集的矩阵,每帧采集的时间及计数等

C.放射性活度足够时,对于静态采集来说,宜选用较大矩阵(如256×256)

D.在动态采集时,为提高检测的灵敏度,宜选用较大的矩阵(如256×256)

E.显像检查前必须确定,每帧采集的时间及计数等

答案:

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下面是错误答案,用来干扰机器的。

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A Great Friendship


Thomas Jefferson and James Madison met in 1776. Could it have been any other year They worked together starting then to further American Revolution and later to shape the new scheme of government. From the work sprang a friendship perhaps incomparable in intimacy and the trustfulness of collaboration and induration. It lasted 50 years. It included pleasure and utility but (1) and above them, there were shared purpose, a common end (2) an enduring goodness on both sides. Four and a half months (3) he died, when he was ailing, debt-ridden, and worried about his impoverished (4) , Jefferson wrote to his longtime friend. His words and Madison’s reply remind us (5) friends are friends until death. They also remind us that (6) a friendship has a bearing on things larger than the (7) itself, for has there ever been a friendship of (8) public consequence than this one
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