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【单选题】
X线管内电子轰击的面积称:A.
小焦点
B.
大焦点
C.
实际焦点
D.
有效焦点
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举一反三
【单选题】In comparison with the adult American population today, the Americans of the 1910s ____.
A.
ate more food and had more physical activities
B.
ate less food but had more activities
C.
ate less food and had less physical exercise
D.
had more weight problems
【单选题】The_____of the music are as interesting as the music itself. American Negroes, or blacks, as they are called today
A.
discoveries
B.
originals
C.
resources
D.
origins
【单选题】The_____of the music are as interesting as the music itself. American Negroes, or blacks, as they are called today
A.
The_____of the music are as interesting as the music itself. American Negroes, or blacks, as they are called today A.discoveries
B.
originals
C.
resources
D.
origins
【简答题】Today we are going to ____________ (更加仔细地看看) the diet of the average American citizen.
【单选题】In comparison with the adult American Population today, the Americans of the 1910s ______.
A.
ate more food and had more physical activities
B.
ate less food but had more activities
C.
ate less food and had less physical exercise
D.
had more weight problems
【单选题】Children in American today are denied the chance of ______.
A.
attending to patients
B.
visiting dying patients
C.
having access to a hospital
D.
learning how to face death
【单选题】在Excel中，关于公式“=Sheet2! A1+A2”表述正确的是（）。
A.
将工作表Sheet2中Al单元格的数据与本表单元格A2中的数据相加
B.
将工作表Sheet2中Al单元格的数据与单元格A2中的数据相加
C.
将工作表Sheet2中Al单元格的数据与工作表Sheet2中单元格A2中的数据 相加
D.
将工作表中Al单元格的数据与单元格A2中的数据相加
【单选题】Today the American doctor is one of the foremost heart-transplant surgeons in the world, ______tens of such operations each year.
A.
to perform
B.
performing
C.
to performing
D.
perform
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