单项选择题

- - Yes, you can take the No.5 bus over there A.
Where can I take the bus How can I get to the bus station B.
Is there a bus I can take Which bus can I take C.
Which bus can I take D.
How can I get to the bus station

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单项选择题下列说法正确的是 A. 吸收曲线与物质的性质无关 B. 吸收曲线的基本形状与溶液浓度无关 C. 浓度越大,吸光系数越大 D. 吸收曲线是一条通过原点的直线

多项选择题常用的气相色谱载气有