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（1）甲实验的目的是探究钢球动能的大小与 的关系；实验时，它是通过观察 ，从而判断钢球动能的大小。
（2）进行乙实验时，每一次都让同一小车从斜面上相同的高度由静止滑下，其目的是使小车在水平面运动的起始 相同；通过观察小车在粗糙程度不同的水平面上运动 来判断小车在不同的水平面受到 的大小．从而可以推理：如果运动的物体不受力，它将 。 查看习题详情和答案>>
写作
根据中英文提示，向游客介绍Whistler Valley.
Whistler Valley是个一年四季度假的好地方.春天可骑马走过漂亮的森林,夏天可以划皮艇,那是一项激动人心的运动。如果你喜欢钓鱼，Whistler将是最好的地方。秋天你一边钓鱼一边放松。冬天那里就是滑雪爱好者的好去处，勇敢的人可以尝试高空滑雪或滑雪摩托。然而孩子们和老人们喜欢乘坐由马或狗拉的雪橇观光，那既放松又有趣。
(1) all-year round, place, take a vacation
(2) ride horses, through, forest
(3) enjoy rafting, exciting
(4) fishing, relaxed
(5) skiing lovers, brave, try, helicopter skiing, snowmobiling
(6) however, take the sleigh or dogsled, sightseeing, relaxing, interesting
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查看习题详情和答案>>在铜仁市开展“4+2”特色教育活动中，你是怎么做的。请根据内容提示，用英语写一篇短文。
内容提示:每天早上做早操......
每天课外活动时间打球、唱歌、跳舞.....
每天至少运动一小时
我擅长......
参考词汇: do morning exercises play basketball/ping pong dance song songs
have at least...for sports every day be good at/do well in win
要求：
1.语言表达准确，语意通顺、连贯；
2.书写工整、规范；
3.根据所给内容和参考词汇，可适当发挥；
4. 文中不得出现真实的校名和人名；
5. 词数：70词左右。文章的开头,和结尾己给出, 不计入总词数。
Students all take an active part in Tongren Four and Two Special Education Acitivities in our school.
Every morning, I
In these activities, I am happier and happier. What’s more, I can study much harder..
查看习题详情和答案>>用方框中所给单词的适当形式填空，使短文正确、通顺（每词限用一次）。
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As we know, the waste of food on the dining table in China is very serious, especially in some wedding celebrations and official reception (政府接待 ). Sometimes some dishes are even completely thrown 96 However, to our happiness, more and more people begin to 97 he importance of saving. For example, nearly 750 restaurants in Beijing have 98 in the "clear your plate" （运动）, which is called "Guangpan" 99 Chinese. The Popular action makes the public order less 100 and eat up the ha on their plates. Many restaurants also start to provide the 101 with smaller dishes in order to reduce
waste. 102 , they even encourage the customers to take leftovers (剩菜) home. Actions speak 103 than words. If everybody can take 104 in this campaign, there will be fewer people in hunger. So let's 105 wasting from now on.
查看习题详情和答案>>在铜仁市开展“4+2”特色教育活动中，你是怎么做的。请根据内容提示，用英语写一篇短文。
内容提示:每天早上做早操......
每天课外活动时间打球、唱歌、跳舞.....
每天至少运动一小时
我擅长......
参考词汇: do morning exercises play basketball/ping pong dance song songs
have at least...for sports every day be good at/do well in win
要求：
1.语言表达准确，语意通顺、连贯；
2.书写工整、规范；
3.根据所给内容和参考词汇，可适当发挥；
4. 文中不得出现真实的校名和人名；
5. 词数：70词左右。文章的开头,和结尾己给出, 不计入总词数。
Students all take an active part in Tongren Four and Two Special Education Acitivities in our school.
Every morning, I
In these activities, I am happier and happier. What’s more, I can study much harder..
查看习题详情和答案>>