【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】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】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】一弹簧振子作简谐振动,总能量为E,若振幅增加为原来的2倍,振子的质量增加为原来的4倍,则它的总能量为