问题
单项选择题
汞液滴定法使用的指示剂是()。
A、酚酞
B、二苯卡巴腙
C、钍啉
D、淀粉
答案
参考答案:B
汞液滴定法使用的指示剂是()。
A、酚酞
B、二苯卡巴腙
C、钍啉
D、淀粉
参考答案:B
根据句意,用方框内所给单词的适当形式填空。(每小题1分,共5分)
小题1:I often hear them ____the piano in the room. 小题2: Teachers’ Day in the _____month of the year . 小题3:Tom fell ____in the class yesterday because he was very tired. 小题4:—Excuse me ,what’s the price of these ___? —Six yuan a kilo . 小题5: I think Sally will be the ____of the English competition in our school. |