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201906B Structure BDirections: Fill in the blank with the proper form of the word given in bracket.If you couldn't keep the (appoint)_____, please inform us as early as possible.

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201906B Structure BDirections: Fill in the blank with the proper form of the word given in bracket.There is something wrong with the printer, and I’ll have it (repair)____.

201906B Structure BDirections: Fill in the blank with the proper form of the word given in bracket.The project turned out to be (easy)_____than we thought because we had the support of many people.

201906B Structure BDirections: Fill in the blank with the proper form of the word given in bracket.You should read this manual (careful)____before you start to use the device.

有A、B 两份不同浓度的有色溶液，A 溶液用1.0cm 吸收池，B 溶液用3.0cm 吸收池，在同一波长下测得的吸光度值相等，则它们的浓度关系为（）。[华中农业大学2015 研]

A 是B 的1/3
B. A 等于B
C. B 是A 的3 倍
D. B 是A 的1/3