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【单选题】
能用对亚硝基-二甲苯胺试剂区别下列各组化合物的是A.
大黄素和芦荟大黄素
B.
大黄素和大黄酚
C.
大黄素和大黄素葡萄糖苷
D.
大黄素和大黄素蒽酮
E.
大黄素和大黄酸
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反馈参考答案：
举一反三
【单选题】What did the writer think about his recorder when he found it left on the train? ______
A.
He wanted to send it to the old man as a report.
B.
He didn’t want to get it back because it was old and broken
C.
He thought that the old man liked the recorder very much and kept it for himself
【简答题】动词填空：用括号内所给动词的适当形式填空，并将答案写在答题卡标有题号的横线处（本大题共8小题，每小题1分，共8分） 小题1:Many people like to add some sugar while (drink) black tea. 小题2:Mo Yan, a Chinese writer (honor) with the Nobel Prize last year. 小题3:— Wil...
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