能水解β-果糖苷键的酶是
A．转化糖酶
B．麦芽糖酶
C．杏仁苷酶
D．纤维素酶
E．内酰胺酶
参考答案：A
---Hi, Jane. Are you free at six this evening? I was wondering if you could come with me to see the movie “X-men”.
---I’m sorry but I________it already. Besides, I________my mother do the laundry.
A．had seen; would be helping
B．saw; will help
C．have seen; would help
D．have seen; will be helping
SKF197726型滚子轴承装置由哪些零部件组成？与国产197726型滚子轴承的区别有哪些？
