单项选择题


A．directories
B．instructions
C．specifications
D．commentaries
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单项选择题
A．adaptableB．approachableC．availableD．agreeable
A．adaptable
B．approachable
C．available
D．agreeable
单项选择题
The book mentioned in this passage is written for readers who ______.
A．are intelligent college students and lay person who do not know much about science
B．are good at producing various gadgets
C．work in a storehouse of dried facts
D．want to have a superficial understanding of science
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