水分子的结构表明，水分子是( )。A．极性分子 B．非极性分子 C．对称分子 D． 发布时间：2018-01-03 10:25 │ 来源：www.tikuol.com 题型：单项选择题 问题： 水分子的结构表明，水分子是( )。A．极性分子B．非极性分子C．对称分子D．无法判断
题型：单项选择题 完形填空。 During the weekend, I usually like to 1 at home, but sometimes I like to go out for a walk 2 play football. My friend Jack works hard 3 the week. At the weekend, he always goes to 4 his uncle and aunt work on their farm with his family.The 5 is not very big, but there is always so much to 6 on a farm. The children look 7 the animals and give them food. Jack and his wife help 8 the fields. At the end of the day, they are all 9 and tired. After Jack's aunt 10 them a big meal, they go back home in a car. ( )1. A. keep ( )2. A. or ( )3. A. on ( )4. A. make ( )5. A. farm ( )6. A. see ( )7. A. at ( )8. A. on ( )9. A. hungry ( )10. A. carriedB. stay B. but B. in B. wait for B. shop B. do B. for B. at B. interested B. gives C. sit C. and C. during C. find C. house C. make C. after C. with C. excited C. passesD. stand D. also D. for D. help D. car D. help D. up D. in D. angry D. sends 查看答案