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【判断题】
零件图是制造和检验零件的依据A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】______ plants, which manufacture their own food, animals obtain nourishment by acquiring and ingesting their food.
A.
As
B.
Different
C.
Unlike
D.
As many
【判断题】用双硫腙光度法测定Pb2+， Pb2+的浓度为0.08mg／50mL，用2cm比色皿在520nm下测得T＝53％，经计算，ε＝8.9×103L·mol－1·cm－1。
A.
正确
B.
错误
【单选题】Successful education is the acquiring of knowledge from ______.
A.
classrooms, laboratories and museums
B.
all sources available
C.
intimate association between beginners
D.
experienced scholars
【判断题】用双硫腙光度法测定Pb 2+ , Pb 2+ 的浓度为0.08mg/50mL,用2cm比色皿在520nm下测得 T =53%,经计算,ε=8.9×10 3 L·mol -1 ·cm -1 。
A.
正确
B.
错误
【单选题】Other businesses, such as insurance companies, are more concerned with acquiring a central position so that they are ______ to the urban population.
A.
beneficial
B.
relevant
C.
independent
D.
accessible
【简答题】________ evidence that language-acquiring ability must be stimulated. A) If being B) It is C) There is D) There being
【简答题】用双硫腙光度法测定Pb 2+ ，Pb 2+ 的浓度为0.08mg/50cm 3 ，用2cm比色皿在520nm处测得T=53%。求k=?(Pb原子量207.2。)
【简答题】用双硫腙光度法测定 Pb 2+ 。 Pb 2+ 的浓度为 0.08mg / 50 mL ,用 2cm 比色皿在 500nm 下测得 T =53 %,求 κ 。
相关题目：
【判断题】用双硫腙光度法测定Pb2+， Pb2+的浓度为0.08mg／50mL，用2cm比色皿在520nm下测得T＝53％，经计算，ε＝8.9×103L·mol－1·cm－1。
A.
正确
B.
错误
参考解析：
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