单项选择题

Although baleen whale may weigh ______ twenty elephants, it feeds on sea plants and animals.

A．so much to
B．as much to
C．so much as
D．as much as
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单项选择题
The oil industry of India ______ two World Wars and withstood the economic, social and political upheavals of a particularly troubled century.
A．survived
B．has survived
C．was survived to
D． has been surviving
单项选择题
The basic rock material is referred to ______.
A．as the matrix
B． be the matrix
C．by scientist to be the matrix
D．as being the matrix
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