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举一反三
【单选题】关于翡翠的颜色对价格的影响，以下哪种说法是错误的？
A.
当翡翠颜色的饱和度逐渐降低时，价格也随之下降
B.
当翡翠的黄色调逐步增加时，价格逐步降低，但降低的幅度相对较小
C.
当翡翠的蓝色调逐步增加时，价格逐步降低，但降低的幅度相对较大
D.
当翡翠的色浓度降低时，价格也随之降低
【单选题】Parents should stop blaming themselves because there’s not a lot they can do about it. I mean the teenager (十几岁的孩子) problem. Whatever you do or however you choose to deal with it, at certain times a w...
A.
a specialist in teenager studies
B.
a headmaster of a middle school
C.
a parent with teenage children
D.
a doctor for mental health problems