皮皮学，免费搜题
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搜题
【单选题】
According to the professor, what is the problem with visual stereotypes?A.
They are connected to a specific culture.
B.
They represent the world as it really is.
C.
They communicate a lot of information.
D.
They are used only in children's books.
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】滴定曲线第一化学计量点适用的指示剂为:
A.
苯胺黄（pH变色范围为1.3~3.2)
B.
甲基橙(pH变色范围为3.1~4.4)
C.
中性红(pH变色范围为6.6~8.0)
D.
酚酞(pH变色范围为8.0~10.0)