【单选题】【消耗次数：1】
（ ）岁时婴儿的视敏度就基本接近成人水平了。
①
2
②
4
③
6
④
3
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①
p<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/929202E378A4D342B21977DCDA32FBDA.png data-tex=\leftrightarrow />q
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p<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge />q
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