The beautiful girl has long hair_____ bunches. [ ]
A. in
B. at
C. for
D. of
答案:A
一矿井深180 m,在井口每隔一段时间落下一个小球,当第11个小球刚从井口开始下落时,第1个小球恰好到达井底。(g取10 m/s2)
(1)求相邻两个小球下落的时间间隔;
(2)求此时第3个小球的速度。
根据对话内容,在下面横线上写出对话中所缺的单词。
A:Doctor,I’m not feeling well.
B:What’s 1 2 ,madam?
A:I often feel 3 when I do the cooking.
B:Oh,I’m afraid you eat too much and didn’t 4 enough exercise.
A:But how can I get 5 ,doctor?
B:If you want to get thinner,you have to eat less food.
1._____ 2._____ 3._____ 4._____ 5._____