问题 填空题

神舟九号飞船载着三名航天员实现与天宫手控交会对接,向太空筑巢之梦迈出关键一步。请问:(1)宇航员把笔带到太空其质量会      (变大/不变/变小),作出这一判断的依据是         ;(2)“神九”和“天宫”在绕地球运行的过程中,     (受/不受)力的作用,作出这一判断的依据是               

答案

不变,质量不随位置的变化而变化,受,力是改变物体运动状态的原因

题目分析:(1)宇航员把笔带到太空,质量不变.因为只是改变了笔所在的位置,组成笔的物质多少没有变化;

(2)力的作用效果之一是改变物体的运动状态,其中运动状态的改变包括速度和方向变化两个方面.

“神九”和“天宫”在绕地球运行的过程中,受到力的作用,因为此过程中它们运行的方向时刻在变化,即力是改变物体运动状态的原因.

点评:此题不仅是对质量特点、力的作用效果的考查,更渗透了情感、态度和价值观.

完形填空

请先通读短文,掌握其大意,然后从所给的选项中选出最佳选项。

Jack is a boy of fifteen. His parents died 3 years ago. One day when he was walking in the street, he   56  a wallet. He returned it to the owner, Mr. Baker. He gave his    57   to the boy. As the boy had no job, Mr. Baker made him work for him in his    58  . Jack worked so hard that Mr. and Mrs. Baker were    59   with him.

Mr. Baker loved planting    60 . The week before last, he brought a few trees home, planted them in the    61  himself and watered them every day. Several days    62  , he had to leave for another city. Before he started, he said to Jack, “Take good care of these trees. Some boys near our house always want to steal them.” “ Don’t     63   about them, sir.” answered Jack," I’ll try my best to watch them."  Six days passed, and Mr. Baker came back. He asked, “   64   anyone ever stolen the  trees?” “No, sir.” said Jack. “To stop someone from stealing the trees, I    65   them up six days ago. I have hidden them for almost a week.”

小题1:A. bought                     B. found                             C. carried

小题2:A. wallet                        B. pity                                C. thanks 

小题3:A. office                          B. factory                          C. home

小题4: A. pleased                           B. angry                             C. sad

小题5:A.  trees                      B. flowers                         C. vegetables

小题6: A. garden                    B. office                             C. room

小题7:A. ago                             B. later                              C. after

小题8:A. think                           B. talk                                   C. worry

小题9:A. Did                              B. Does                              C. Has

小题10:A. sent                            B. pulled                            C. put

问答题