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