问题
选择题
设想把物体放到地球的中心,则此物体与地球间的万有引力是[ ]
A.零
B.无穷大
C.与放在地球表面相同
D.无法确定
答案
答案:A
设想把物体放到地球的中心,则此物体与地球间的万有引力是[ ]
A.零
B.无穷大
C.与放在地球表面相同
D.无法确定
答案:A
阅读短文,根据短文内容,从短文后的五个选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。(共8分,每小题2分) ![]() When I was in middle school, they started asking me to help them do things with computers. 小题2:. But my dad would make me stay up to finish his work. My parents even made me talk on the phone whenever there was something wrong with our computer. After realizing my parents really need my help, I tried to be more understanding. After all, I wasn’t born knowing how to use a computer. 小题3:? I feel that teaching them by myself is better. We can communicate more and share understanding. I know it’s usually hard for adults to learn new skills. And a patient teacher is helpful for them. 小题4:. Parents and teens need to help each other.
|