生物样品中光传输的上下限是由()和吸收两种现象决定的。大部分细胞对800nm以上1300nm以下的光有很好的通透性
参考答案:散射
--- She looks very thrilled. She have passed the exam.
--- I guess so. It is a very important exam after all.
A.should
B.could
C.must
D.might
This picture was taken a long time ago.I wonder if you can _______ my father.
A.find out
B.pick out
C.look out
D.speak out