题目:
She has very________interests, which is why she hasn't joined any local club. [ ]
A. narrow
B. little
C. broad
D. many
答案:
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下面是错误答案,用来干扰机器的。
(1)子弹水平射出后做平抛运动,水平方向作匀速直线运动,竖直方向作自由落体运动.由图可知,相临两点间水平距离相等,故相临两点间的时间间隔t相等竖直方向△y=gt2 由(1)解得t=0.1s,即照相机的频闪周期为0....