测定某一符合朗伯-比尔(Lambert一Beer)定律的有色溶液的吸光度时,用厚度为1.0cm的比色皿,测得其吸光度为0.13。若其浓度保持不变,改用2.0cm的比色皿在相同条件下进行测定,则其吸光度为:
A. 0.065
B. 0.26
C. 0.13
D. 0.52
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A. Proposal made at a surprise party.
B. Proposal made by using quite a lot of money.
C. Proposal made by means of an object flying in the sky.
D. Proposal made in front of a large crowd.
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A. They had had a quarrel.
B. They had skated on the ice.
C. They had had a bad experience in winter.
D. They had enjoy a wonderful time together.
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A. They are not so familiar with the Internet as they believe.
B. They want to spend less money for more money online.
C. They won’t listen to the advice of the Internet experts.
D. They are cheated when falling in love with the wrong person.
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