建筑工地上的起重机把一框砖先竖直向上提升40m，然后水平移动30m，此过程中砖块的路程和位移大小（ ）
A：路程和位移都是70m
B：路程和位移都是50m
C：路程为70m，位移为50m
D：路程为50m，位移为70m
通过对《多彩的光》学习，以下物理现象中符合客观事实的是（ ）
处于地球最南端的大洲是（ ）
Susan is 14 years old and she is an American girl. She is one of my best friends. She is interested in Chinese and good at it. Every summer she travels with her parents. She believes（相信） that traveling is an important part in her life. She likes London best because it is both clean and beautiful. She knows that China is a large country with lots of interesting places. This July, her family are coming to China. I am very happy to know that they will first come to my city. They will stay here for three days. I will take them to visit the city. Then they will fly to Beijing. I am sure they will have a nice time in China.
Who
Susan is an ____ girl.
She is interested in Chinese and does ____ in it.
What
She ____ with her parents every summer.
Traveling is an important ____ in her life.
Where
She likes London ____ because London is both ____ and beautiful.
When
This ____, her family are coming to China.
She knows China is a large country with a lot of ____ places.
How long
They will stay here for three ____.
How
Then they will go to Beijing by ____.
以下关于商周冶铸业、唐宋制瓷业、汉唐丝织业发展主要表现的叙述，不正确的是( )
①商周时代，青铜铸造业进入了繁荣时期，代表有司母戊鼎、四羊方尊、三星堆青铜礼器等
②唐朝时出现五大名窑；宋朝已经形成南青北白两大制瓷系统
③西汉政府设在长安的东西织室有数千工人
④汉唐的丝织技术都很高，以轻盈精湛著称，还吸收了波斯的织法和图案风格
