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【单选题】
根据第姆特方程式,指出下面说法是正确的 ( )
A.
最佳流速时，塔板高度最小；
B.
最佳流速时，塔板高度最大；
C.
最佳流速时，流速最小；
D.
塔板高度与流速成反比。
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参考答案：
举一反三
【单选题】某溶液的pH为9.180,其氢离子活度为
A.
6´10-10
B.
6.6´10-10
C.
6.6´10-10
D.
6.6´10-10
查看完整题目与答案
【单选题】Kate asks questions about the director. What mistake does she make?
A.
She thinks the director is a woman.
B.
She thinks the director is a family member.
C.
She thinks the director is a man.
查看完整题目与答案
【单选题】某溶液的氢离子活度为1×10-9mol/L,其pH值应为9,pOH值应为( )。
A.
9
B.
6
C.
5
D.
8
查看完整题目与答案
【单选题】She admired the director to such an extent that she took his words as____oracles.
A.
divine
B.
rebellious
C.
faithful
D.
unbearable
查看完整题目与答案
【单选题】某溶液的pH为9.180,其氢离子活度为
A.
610-10
B.
6.610-10
C.
6.6110-10
D.
6.60710-10
查看完整题目与答案
【简答题】生物半减期____是指化学物质吸收入体内以后,在体内每减少一半____所需的时间。
查看完整题目与答案
【单选题】网店中有20个单品,其中15个在本月份有销售记录,请问网店的商品动销率是多少?
A.
75%
B.
25%
C.
50%
D.
80%
查看完整题目与答案
【简答题】A．She is the director of the group. B．She is playing the violin. C．She is playing the piano. D．She is playing the bass.
查看完整题目与答案
【多选题】进气支管绝对压力传感器常见故障有()
A.
电源或信号电路短路或断路
B.
传感器损坏
C.
进气道内有杂物堵塞或有油污
D.
真空软管连接不当或破裂
查看完整题目与答案
【简答题】A．She is the director of the group. B．She is playing the piano. C．She is playing the violin. D．She is playing the bass.
查看完整题目与答案
相关题目：
【单选题】某溶液的pH为9.180,其氢离子活度为
A.
6´10-10
B.
6.6´10-10
C.
6.6´10-10
D.
6.6´10-10
查看完整题目与答案
【单选题】Kate asks questions about the director. What mistake does she make?
A.
She thinks the director is a woman.
B.
She thinks the director is a family member.
C.
She thinks the director is a man.
查看完整题目与答案
【单选题】某溶液的氢离子活度为1×10-9mol/L,其pH值应为9,pOH值应为( )。
A.
9
B.
6
C.
5
D.
8
查看完整题目与答案
【单选题】She admired the director to such an extent that she took his words as____oracles.
A.
divine
B.
rebellious
C.
faithful
D.
unbearable
查看完整题目与答案
【单选题】某溶液的pH为9.180,其氢离子活度为
A.
610-10
B.
6.610-10
C.
6.6110-10
D.
6.60710-10
查看完整题目与答案
【简答题】生物半减期____是指化学物质吸收入体内以后,在体内每减少一半____所需的时间。
查看完整题目与答案
【单选题】网店中有20个单品,其中15个在本月份有销售记录,请问网店的商品动销率是多少?
A.
75%
B.
25%
C.
50%
D.
80%
查看完整题目与答案
【简答题】A．She is the director of the group. B．She is playing the violin. C．She is playing the piano. D．She is playing the bass.
查看完整题目与答案
【多选题】进气支管绝对压力传感器常见故障有()
A.
电源或信号电路短路或断路
B.
传感器损坏
C.
进气道内有杂物堵塞或有油污
D.
真空软管连接不当或破裂
查看完整题目与答案
【简答题】A．She is the director of the group. B．She is playing the piano. C．She is playing the violin. D．She is playing the bass.
查看完整题目与答案
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