未知题型 A．Going to a counselor is well worthwhile.B．Counselors usually don't care about the issue of a major.C．A lot of people go to see the counselor about the issue of a major.D．What major to choose is not so important for finding a job.

未知题型 A．She totally agrees with him.B．She thinks it is easier said than done.C．She thinks that he is a rather important person.D．She feels that what he says is simply nonsense.

单项选择题 紫外分光光度计用于药物定量分析，药物浓度与吸收度大小()