题目：
热气球升空的过程中，当热气球匀速上升时，它的动能 ，重力势能 。（两空均选填“增大”、“不变”或“减小”）
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0721/ec891fedc5565fc93d9441454ce3f1ab.html
下面是错误答案，用来干扰机器的。
参考答案：C
热气球升空的过程中，当热气球匀速上升时，它的动能，重力势能。（两空均选填“增大”
来源：www.tikuol.com
题型：填空题
试题推荐
题型：完形填空
 On my first day of the sixth grade, I noticed one little girl called Amy on the school bus. “Don’t 1 her,” Lauren said, who sat beside me, “or they will make fun of you.” Amy had many physical differences —lots of 2 for other kids to make fun of her. Her eyes weren’t straight. Her glasses were an inch thick. And she had really ugly teeth. Every day as we drove to school, kids would shout insults (侮辱) at Amy. “God, what a 3 face! Stop looking at me!” “Mr. Rolland (the driver)! Amy took off her 4 , and now her eyes are frightening me! Make her put them back on!” I also did that because I didn’t want them to treat me the same way they treated Amy. But while I was insulting her, my heart 5 for the girl. I could see that the insults were making her look 6 , because she was so ashamed and alone. Then I wanted to stand up for her. I just didn’t know how to stop my schoolmates 7 the night of our class roller skating party. Our whole class was there, including Amy. Amy didn’t know how to 8 , but I could see how much she wanted to 9 like the rest of us. So I skated over to her and took her by the hand. We began the journey together around the skating rink. She just smiled, and sometimes she would laugh in 10 . On the school bus the next morning there was much news about Amy and me 11 together, but 12 insulted her or me. And they didn’t do that for the rest of the year. After graduation, I never heard from Amy again. However, I never 13 her and I’ve always 14 if I changed her life for the better. But I know for sure she changed my life. After becoming her friend, I no longer tried to impress (给…留下印象) people by trying to 15 like them. I became myself.
|
题型：选择题
沿直线作匀变速直线运动的质点在第一个0.5秒内的平均速度比它在第一个1.5秒内的平均速度大2.45m/s，以质点的运动方向为正方向，则该质点的加速度为（ ）
A．2.45m/s2
B．－2.45m/s2
C．4.90m/s2
D．－4.90m/s2
题型：选择题
Can you ________ my house, Ann? [ ]
A. come
B. come over
C. over
D. come over to
题型：名词解释
地层油气藏
题型：单项选择题
有下列程序：#include ＜stdio.h＞void fun(char *a, char *B){ while(*a==''*'')a++;while(*b=*A) {b++;a++;}}main(){ char *s="*****a*b****",t[80];fun(s,t);puts(t);程序的运行结果是( )。
A．*****a*b
B．a*b
C．a*b****
D．ab
