【单选题】一水平放置的弹簧振子作简谐振动,其总能量为E。如果简谐振动的振幅增加到原来的四倍,而重物的质量变成原来的四分之一,则弹簧振子的总能量变为 [ ]
【简答题】In the middle of the night, Peter's wife suddenly fell ill. She couldn't help crying, “Oh, my stomach! Get the 1 !” Peter, awaking from a deep sleep, thought his wife was only having a 2 dream. “Stop ...
【判断题】Mark Twain(马克·吐温)was an American writer(作家).One day he went to a city by train.He wanted to see one of his friends there.He was a very busy man.He usually forgot something. When he was in the train,th...
【单选题】在 JavaScript 中,能够实现页面重新加载的选项是 ( )
C.
location.replace(href);
【单选题】一弹簧振子作简谐振动,总能量为E,若振幅增加为原来的4倍,振子的质量增加为原来的2倍,则它的总能量为
【简答题】听下面一段对话,回答1-3三个小题。 1. Why didn't the woman enjoy herself? [ ] A. She couldn't enter the park. B. She couldn't see the firework clearly. C. She couldn't find her friends. 2. When did the woman get ...
【简答题】根据汉语提示填写单词。 1. The old woman couldn't find her purse, she looked ________(着急). 2. We ________(举行) an English party the day before yesterday. 3. The baby laughed ________(高兴). 4. If it ________(下雨) tom...
【单选题】苏轼在《题西林壁》中提出了“当局者迷,旁观者清”这一道理的诗句是