投资与净资产比率的参考值是()。
A.20%
B.40%
C.50%
D.70%
参考答案:C
根据句意填单词,使句意完整。
l. They studied English about three years.
2. You are too old to learn.
3. I was born May 6th, 1993.
4. Yesterday evening a boy _ Wang Lin phoned you.
5. When did she a movie star?
洋地黄毒糖是()
A.6-去氧糖
B.2,6-二去氧糖
C.6-去氧糖甲醚
D.α-氨基糖
E.α-羟基糖