问题 选择题

下列生物之间属与合作关系的是(  )

A.草原中的兔和狼

B.生活在豆科植物上的菟丝子

C.稻田中的水稻和稗草

D.蜜蜂采蜜

答案

生物与生物之间的关系常见有:捕食关系、竞争关系、合作关系、寄生关系等.兔和狼,狼吃兔是为了获取食物维持生存,属于捕食关系;菟丝子和豆科植物,菟丝子从豆科植物体内获取营养,维持自己的生活,对豆科植物造成伤害,属于寄生关系;水稻与水稻株旁的稗草,相互争夺阳光、水分、无机盐和生存的空间,属于竞争关系;蜜蜂采蜜,需要许多蜜蜂,彼此合作、密切配合才能完成,因此属于合作关系.

故选D.

完形填空

My life is always filled with sadness and little joy. However, no matter what happens, I can always face it bravely.

Last year, I couldn’t believe the    that I was allowed to enter the only key high school in my hometown. Then I rushed to my home and told my parents. But my father didn’t seem as    as I was. He just kept smoking without saying a word and my mother put her head down and couldn’t help     .

I knew very well what my family was     . My mum had been ill in bed for2 years. We lived a hard life and I couldn’t continue my schooling. I felt so upset but I could say     to my parents. I decided to help my father with his work     my family.

To my surprise, things completely changed     the beginning of the new term. My head teacher came to my family with some money, which had been     by my schoolmates. He encouraged me, “Always have a dream.” With tears in my eyes, I stepped into the key high school.

I have been studying hard since I entered the high school. Whenever I meet difficulties, I always     my teacher and schoolmates. I have a college dream and I must work hard for it, no matter     hard the life is. Just as a great man says, “When one door shuts, another opens in life.”

小题1:A. news          B. story               C. idea    

小题2:A. nervous         B. excited         C. interested      

小题3:A. saying          B. laughing        C. crying          

小题4:A. like               B. before              C. about

小题5:A. something      B. nothing         C. anything    

小题6:A. to support      B. support         C. supporting      

小题7:A. after              B. before              C. since       

小题8:A. planned        B. spent               C. raised      

小题9:A. dream of           B. think of        C. hear of         

小题10:A. what           B. which               C. how

问答题 简答题