问题
单项选择题
Lines drawn through points on the earth having the same atmospheric pressure are known as（）.
A.isothermal
B.millibars
C.isobars
D.seismics
答案
参考答案：C
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Lines drawn through points on the earth having the same atmospheric pressure are known as（）.
A.isothermal
B.millibars
C.isobars
D.seismics
参考答案：C