挂着标语的氢气球在太阳光的照射下,温度升高,体积膨胀.气球受到的重力______

题型:填空题

问题:

挂着标语的氢气球在太阳光的照射下,温度升高,体积膨胀.气球受到的重力______,气球受到的浮力______•(均选填“增大”“减小”或“不变”)

考点:重力的概念浮力及阿基米德原理
题型:填空题
阅读理解。
Dear Nancy
     I am happy to tell you my school and my life. Every day my father drives me to school. My school is very big and beautiful. I like my school very much. The desks and chairs are new. There are lots of pictures on the walls. You can also see some flowers on the teachers’ desk. We clean the classroom every day.
I don’t go to school on Saturday and Sunday. I get up at six on Saturday. I play basketball with my father in the park near my home for half an hour. Then I eat my breakfast. I help my mother water the trees and flowers in the garden. At eight I begin to do my homework. My parents and I have lunch in the KFC. In the afternoon. I have Art lessons. Sometimes I play computer games or chat with my friends on the Internet in the evening.
     I like my weekend very much.
                                                                                                                                             Yours,
                                                                                                                                              Li Hua
Who is the letter from?It tells about Li Hua’s school and 1.______    
2.______ does Lihua go to                 school every day?He goes to school by 3.______with his father every day.
What is his school like?It’s big and beautiful.
What does he usually do at  weekend?He often 4.______ basketball with his father and helps his mother  water    the trees and flowers in the garden.
When does he do his homework on     Saturday?He does his homework in the 5.______
How can he chat with his friends?He can chat with his friends on the Internet.
题型:填空题

柴油集油箱液位过低,DCS如何调节?

题型:填空题

侵染性植物病害和非侵染性植物病害在圃地分布有何不同?

题型:填空题

雪情通告的标志是()

A.NOTAMS

B.NOTAMW

C.SNOWTAM

题型:填空题

肠袢未发生旋转或不全旋转及反旋转而形成()

A.肠袢转位异常

B.甲状舌管囊肿

C.环状胰

D.先天性无神经节性巨结肠

E.胆管闭锁

更多题库