驱除蔬菜褐变现象可以用（）。
A.碱性溶液
B.酸性溶液
C.中性溶液
D.活性溶液
参考答案：B
Many a student _____ the importance of learning a foreign language. [ ]
a. have realized
b. has realized
c. have been realized
d. has been realized
简述职工代表大会（中小型企业为职工大会）。
