问题
不定项选择
伽利略用实验验证v∝t的困难是 [ ]
A．当时没有测量时间的仪器
B．不能很准确地测定下落的距离
C．不能测出下落物体的瞬时速度
D．缺少科学研究方法的指导
答案
答案：C
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伽利略用实验验证v∝t的困难是 [ ]
A．当时没有测量时间的仪器
B．不能很准确地测定下落的距离
C．不能测出下落物体的瞬时速度
D．缺少科学研究方法的指导
答案：C
Ming Ming and Lily are in the same school, 1 they are not in the same class. They go 2 school on weekdays (工作日，平时). 3 school, Ming Ming and Lily often play games with 4 friends. Classes begin 5 eight in the morning. Now Ming Ming and Lily are in their classrooms. They listen to their 6 . Ming Ming studies English in the first class. His teacher talks 7 them in English. Lily 8 a Chinese class. Her teacher talks 9 good articles (文章). They study hard. They love their teachers and they like their 10 .
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