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【单选题】
(C) 102.在碘量法中,淀粉是专属指示剂,当溶液呈蓝色时,这是 (B)103 .在EDTA配位滴定中,有关EDTA酸效应的叙述是正确的( ) A.酸效应系数愈大,配合物的稳定性愈高 ; B.酸效应系数愈小,配合物愈稳定; C.反应的pH愈大,EDTA的酸效应系数愈大; D.EDTA的酸效应系数愈大,滴定曲线的pM突跃范围;E.选择配位滴定的指示剂与酸效应无关。 (A)104 .利用电极电位可判断氧化还原反应的性质,但它不能判别( ) A.氧化-还原反应速度 B.氧化还原反应方向 C.氧化还原能力大小; D.氧化还原的完全程度;E.氧化还原的次序。 (D) 105 .高锰酸钾法滴定溶液常用的酸碱条件是( ) A.强碱; B.弱碱; C .弱酸 ; D.强酸。A.
碘的颜色
B.
I － 的颜色
C.
游离碘与淀粉生成物的颜色
D.
I － 与淀粉生成物的颜色
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【简答题】看图完成对话。 John: Ann, what's 1._____ ? Ann: It's a 2._____ . John:Is that 3 mler, too? Ann: No, it 4._____. John: 5._____ that in English? Ann: It's a 6._____. John: Can you spell it, 7.___...
【单选题】Who are Alice’s friends?
A.
Ann and Tom
B.
Tom and Lin Tao
C.
Ann and I．in Tao
D.
Ann， Tom and Lin Tao．
【单选题】Ann is interested in purchasing Ted's factory. Since Ann is a poor negotiator, she hires Mary to negotiate a purchase price. Identify the parties to this transaction.
A.
Mary is the principal and Ann is the agent.
B.
Ted is the principal and Ann is the agent.
C.
Ann is the principal and Mary is the agent.
D.
Mary is the principal and Ted is the agent.
【单选题】Why does the professor think Ann would be interested in going to Yellow Stone?
A.
She is from Wyoming.
B.
She needs the money.
C.
She has been studying animal diseases.
D.
Her thesis adviser is heading the project.
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