以白天分阴阳,上午为()
A.阴中之阳
B.阳中之阴
C.阳中之阳
D.阴中之阴
参考答案:C
I ___ the French written papers but failed in the English oral examination.
A.got through
B.looked through
C.went through
D.lived through
最高能量为100keV的连续X射线其平均能量大约为()
A.100keV
B.0keV
C.40keV
D.80keV
E.20keV