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【单选题】
某种溶液的吸光度A.
与溶液浓度成反比
B.
与入射光波长成正比
C.
与溶液浓度无关
D.
与溶液厚度成正比
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】已知矩阵A＝ (k≠0)的一个特征向量为α＝ ，A的逆矩阵A －1 对应的变换将点(3，1)变为点(1，1)．求实数a，k的值．
【单选题】If nothing is done to protect the environment, millions of spiders that are alive today will have become ________.
A.
deteriorated
B.
degenerated
C.
suppressed
D.
extinct
【单选题】If nothing is done to protect the environment, millions of spedes that are alive today will have become ________ .
A.
deteriorated
B.
degenerated
C.
suppressed
D.
extinct
【单选题】If nothing is done to protect the environment, millions of species that are alive today will have become _____.
A.
deteriorated
B.
degenerated
C.
suppressed
D.
extinct
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