单项选择题

What is the author's attitude towards doctors

A．sarcastic
B．praising
C．objective
D．appreciative
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单项选择题
Livermore's computer map, in combination with weather reports, might be useful in predicting ______.
A．the path of toxic gases from a nuclear power plant explosion
B．where incoming nuclear missiles might strike
C．the average annual rainfall for North Dakota
D．the amount of pollution in the air
单项选择题
The information used by the computer to make its detailed maps ______. Ⅰ. was gathered by the Defense Department and the U. S. Geological Survey Ⅱ. shows points roughly 200 feet apart Ⅲ. involves altitude measurements
A．Ⅰ
B．Ⅰ and Ⅱ
C．Ⅰ and Ⅲ
D．Ⅰ, Ⅱ and Ⅲ
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