正常人血浆中NaHC03/H2C03之比是
A.5:1B.10:1C.15:1D.20:1E.25:1
参考答案:D
She is __________ a pink and white blouse.[ ]
A. wear
B. wears
C. to wear
D. wearing
舒婷出版的第一部诗集是()。