以下不属于不良坐姿的是？（Which of the following is not a unhealthy sitting posture？)
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以下不属于不良坐姿的是？（Which of the following is not a unhealthy sitting posture？)
A.蹲在凳子上用电脑 (Crouching on a stool to use a computer)
B.趴在桌子上写作业 (Lying on the desk and writing homework)
C.低头弯腰用电脑 (Bending down to use a computer)
D.使用电脑时屏幕与眼睛同一水平 (When using the computer, the screen should be at the same level as the eyes)
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D