【多选题】What are the main varieties of Chinese tea?
【判断题】Chinese tea mainly falls into 7 categories in terms of their processing procedures
【单选题】下述情况中,使分析结果产生负误差的是
A.
以盐酸标准溶液测量某碱样,所用滴定管未洗净,滴定时内壁挂液珠
B.
测量 H 2 C 2 O 4 . H 2 O 的摩尔质量时,草酸失去部分结晶水
D.
滴定时速度过快,并在到达终点后立即读取滴定管读数
【单选题】下述情况中,使分析结果产生负误差的是
A.
以 HCl 标准溶液滴定某碱样,所用滴定管未洗净,滴定时内壁挂液珠
B.
以失去部分结晶水的基准物质,标定 NaOH 溶液的浓度
D.
滴定时速度过快,并在到达终点后立即读取滴定管读数
【单选题】某中药折断面连有细密、银白色、富有弹性的橡胶丝,此中药为:
【单选题】This passage mainly discusses ______.
A.
the history of tea drinking in Britain
B.
how tea became a popular drink in Britain
C.
how the Britons got the habit of drinking tea
【判断题】The formation of the Chinese characters “ 茶葉 ” mainly suggests that tea is a kind of vegetation.
【多选题】What are the basic categories of the Chinese tea?
【单选题】下述情况中,使分析结果产生负误差的是 。
A.
以盐酸标准溶液滴定 NaOH 溶液的浓度,用甲基红为指示剂
B.
以失去部分结晶水的草酸为基准物质,标定 NaOH 溶液的浓度
D.
滴定时速度过快,并在到达终点后立即读取滴定管读数
【单选题】—We’d like Chinese black tea,please. —Sorry,we don’t __________ Chinese tea.