苷类酸水解的易难顺序规律是
A. N-苷> O-苷 > S-苷 > C-苷
B. 酮糖苷>醛糖苷
C. 六碳糖苷>七碳糖苷
D. 芳香族苷>脂肪族苷
E. 呋喃糖苷>吡喃糖苷
提取原生苷时,为抑制或破坏酶的活性,可采用
A. 在中药中加入碳酸钙
B. 在中药中加入酸水加热
C. 沸水提取
D. 甲醇提取
E. 新鲜药材迅速干燥
Which of the following is not the correct expression for "车厢"?
A. coach
B. carriage
C. compartment
D. berth
A:__________________________?B: Medium done, please.
A. Would you like some tea?
B. How would you like your beef steak cooked?
C. How do you do?