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【单选题】
患者女性，30岁。乳房胀痛及出现肿块，月经后自行消退，应考虑为（）A.
乳腺癌
B.
乳房纤维瘤
C.
乳腺肉瘤
D.
乳房囊性增生
E.
乳房内乳头状瘤
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反馈参考答案：
举一反三
【单选题】Developing a product or service involves defining the benefits that it will offer. These benefits are communicated and delivered by ________.
A.
product labels
B.
product attributes
C.
support services
D.
product packaging
【单选题】已知某简谐振动的振动曲线如图所示, 则此简谐振动的振动方程为
A.
x=2cos(2/3 πt + 2/3 π）
B.
x=2cos(4/3 πt + 2/3 π）
C.
x=2cos(4/3 πt - 2/3 π）
D.
x=2cos(2/3 πt - 2/3 π）
E.
x=2cos(4/3 πt + 1/4 π）
【单选题】Developing a product or service involves defining the benefits that it will offer. These benefits are communicated and delivered by ________.
A.
product labels
B.
product attributes
C.
support services
D.
product packaging
E.
branding
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