赞题库-背景图

单项选择题

The passage would most likely be found in a texbook on which of the following subjects

A．Astronomy.
B．Botany(植物学).
C．Geology.
D．Chemistry.

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热门试题

单项选择题The reader can conclude that______.

A．countries of the world will work together on pollution problems
B．some industries are now making economic use of liquid wastes
C．by-products from wastes lead to a more prosperous marketplace
D．science is making great progress in increasing water supplies

单项选择题The purpose of this passage is ______.

A．to acquaint the reader with water pollution problems
B．to alert the reader to the dwindling water supply
C．to explain industrial uses of water
D．to demonstrate various measures to solve the pollution problem