与三萜皂苷反应的试剂是（） A: 醋酐一浓硫酸反应 B: 亚硝酰铁氰化钠反应 C: Keller—Kiliani反应 D: 碘化铋钾反应 E: 三氯化铁反应
与三萜皂苷反应的试剂是（） A: 醋酐一浓硫酸反应 B: 亚硝酰铁氰化钠反应 C: Keller—Kiliani反应 D: 碘化铋钾反应 E: 三氯化铁反应
Helen Keller is a source of inspiration for millions.
Helen Keller is a source of inspiration for millions.
When was Helen Adams Keller born?
When was Helen Adams Keller born?
Keller－Kiliani反应所用的试剂是
Keller－Kiliani反应所用的试剂是
According to Helen Keller, life is either_______ or nothing.
According to Helen Keller, life is either_______ or nothing.
Keller-Kiliani(K-K)反应是（ ）的颜色反应。
Keller-Kiliani(K-K)反应是（ ）的颜色反应。
Joan is __________ (急于) to meet Mr. Keller and his family.
Joan is __________ (急于) to meet Mr. Keller and his family.
According to Helen Keller, life is either a daring adventure or nothing.
According to Helen Keller, life is either a daring adventure or nothing.
What made Helen Keller very angry at the age of five?
What made Helen Keller very angry at the age of five?
Helen Adams Keller was an American author, political activist, and lecturer.( )
Helen Adams Keller was an American author, political activist, and lecturer.( )