水的质量密度为1.00,电子密度为3.34,有效原子序数为7.42,最适合替代的组织是()
A.骨
B.肺
C.肌肉
D.脂肪
E.脑
参考答案:C
—My mother is ill in hospital.
—_______________ [ ]
A. Oh, is she OK?
B. I'm sorry to hear that.
C. I don't know.
D. What's wrong?
SLE肾损害的发生机制是()
A.Ⅰ型变态反应
B.Ⅱ型变态反应
C.Ⅲ型变态反应
D.Ⅳ型变态反应