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【单选题】
下列苷类化合物不能被常规酸催化水解的是A.
黄酮碳苷
B.
香豆素酚苷
C.
蒽醌酚苷
D.
人参皂苷
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】根据污水生物系统原理,简述BOD、溶解氧、水中有机物、原生动物在多污染带、α-中污染带、β-中污染带和寡污染带的分布规律。 。
【单选题】When did Winter Vinecki form Team Winter for prostate cancer research and awareness?
A.
After her father died.
B.
10 months later after her father was diagnosed with prostate cancer.
C.
When her father was first diagnosed with prostate cancer.
D.
When she was 15 years old.
【单选题】—I heard they went skiing in the mountains last winter. —It ________ true because there was little snow there. [ ]
A.
may not be
B.
won’t be
C.
couldn’t be
D.
will be
【单选题】— I heard they went skiing in the mountains last winter. — It _____ true because there was little snow there. [ ]
A.
may not be
B.
won't be
C.
couldn't be
D.
mustn't be
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