单项选择题

A: It's too cold. Are you near the door
B: ______.

A．Oh, yes. I see, I will close the door.
B．Oh, yes. What do you need
C．Oh, no. What can I do
D．Oh, is it cold I don't think so.
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单项选择题
German scientists in charge of the studies ______.
A．thought that the surface soil of Mars is mainly composed of silicon and iron, with a bit of sulfur, chlorine and argon
B．doubted if there is any content of silicon and iron, with a bit more of sulfur, chlorine and argon
C．confirmed that the Martian surface emitted X-rays, which indicated the main composition of the Martian soil
D．indicated that the surface soil of Mars has a main chemical composition of silicon and iron
单项选择题
A. normal B: ordinary C. average D. common
A. normal B: ordinary C. average D. common
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