天然苷类中，多形成β-苷的是
A．D-葡萄糖
B．L-鼠李糖
C．D-半乳糖
D．L-阿拉伯糖
E．D-木糖
参考答案：A,C,D
While prices are rising so fast, many people are working out ways to ____ down their expenses. [ ]
A. cut
B. put
C. turn
D. settle
工程监理的中心任务，归结为( )。
A．四控二管三协调B．四控一管一协调C．四控二管一协调D．四控一管二协调
