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【单选题】
茶叶内含有()和()等成分,这类物质本身没有香气,但是具有极强的吸附香气性能。A.
烯萜类、棕榈酸
B.
氨基酸、儿茶素
C.
氨基酸、蛋白质
D.
茶氨酸、茶黄素
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反馈参考答案：
举一反三
【判断题】The engagement ring is usually put on the fourth finger of the right hand.
A.
正确
B.
错误
【单选题】Roberto wants to study how newly engaged couples communicate with each other. He is particularly interested in how each person defines such symbols as the engagement ring, and how each communicates th...
A.
symbolic interactionism
B.
structural functionalism
C.
conflict
D.
feminist
【判断题】The
wife often wears both the wedding ring and engagement ring on the different
finger
A.
正确
B.
错误
【单选题】在一定量以KCl为稳定剂的AgCl溶胶中加入电解质使其聚沉，下列电解质的用量由小到大的顺序正确的是( )
A.
AlCl 3 4＜KCl
B.
KCl＜ZnSO 4 ＜AlCl 3
C.
ZnSO 4 ＜KCl＜AlCl 3
D.
KCl＜AlCl 3 ＜ZnSO 4
【单选题】在一定量以KCl为稳定剂的AgCl溶胶中加入电解质使其聚沉,下列电解质的用量由小到大的顺序正确的是:
A.
AlCl 3 4
B.
KCl 4 3
C.
ZnSO 4 3
D.
KCl 3 4
【简答题】Listen to the conversation about buying an engagement ring. Q: What kind of ring should the man get when he proposes?A. An
emerald ring. B. A
diamond ring. C. A
garnet ring. D. A
sapphire ring.
【单选题】以 KI 为稳定剂,一定量的 AgI 溶胶中,分别加入下列浓度 相同的电解质溶液,在一定时间范围内,能使溶胶完全聚沉所需电解质量最小的是
A.
NaNO 3
B.
Mg(NO 3 ) 2
C.
KNO 3
D.
Al(NO 3 ) 3
【单选题】在一定量以KCl为稳定剂的AgCl溶胶中加入电解质使其聚沉，下列电解质的用量由小到大的顺序正确的是( )
A.
AlCl3＜ZnSO4＜KCl
B.
KCl＜ZnSO4＜AlCl3
C.
ZnSO4＜KCl＜AlCl3
D.
KCl＜AlCl3＜ZnSO4
【单选题】The engagement ring is worn on _______ finger of _____hand in the United States, the United Kingdom, Ireland, Canada, and Australia.
A.
the second the left
B.
the third the right
C.
the fourth the right
D.
the fourth the left
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