问题
选择题
— How is your father today?
— ____________________
A. He is out.
B. He isn't here.
C. He is very tall.
D. He is fine.
答案
答案：D
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— How is your father today?
— ____________________
A. He is out.
B. He isn't here.
C. He is very tall.
D. He is fine.
答案：D
个CO2分子占有的体积为22.4L