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【单选题】
下列说法中不正确的是A.
缓冲溶液实质上是共轭酸碱体系
B.
缓冲溶液的pH主要取决于弱酸的pKa
C.
缓冲溶液的缓冲作用没有一定限度
D.
人体血清及其他体液都是缓冲溶液
E.
既能释放质子又能接受质子的两性物质
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举一反三
【单选题】Mary’s birthday ________ on a Sunday this year.
A.
finds
B.
falls
C.
forecasts
D.
founds
【单选题】Mary's birthday ________ on a Sunday this year.
A.
falls
B.
finds
C.
forecasts
D.
founds
【单选题】--- When _______ Mary’s birthday? --- It’s _______ September.
A.
am; on
B.
is; in
C.
is; on
【简答题】进一步应先作哪项检查（ ）。
【简答题】读一读，填一填。 Jack: When is your birthday, Mary? Mary: It's in February. Jack: I know. But what's the date? Mary: It's February 19th. Jack: And when is your dad's birthday? Mary: It's September 21st. Jack:...
【单选题】直接融资,面向股东来融资,增加企业注册资本金,或者通过资本市场公开上市募资,最终体现在资产负债表中增加()
A.
固定资产
B.
所有者权益
C.
长期负债
D.
流动资产
【简答题】阅读理解 She was born on December 29th. Mary is four years old. Today is Mary's birthday. Mrs. Smith is her mother. There is a party for her. Lots of her friends come to her birthday party. A birthday...
【单选题】Next Friday will be Mary ’ s birthday.
A.
Happy birthday to you .
B.
Let ’ s have a party for her.
C.
Long time no see.
D.
Sorry to hear that.
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