题目

   根据下列句子及所给音标、中文或语境,写出空缺处各单词的正确形式。每空仅限一词。 1. The   ▲     reason for advertising is to sell more goods. 2.    ▲     when they are playing basketball. 4. Our government has   ▲     more jobs for people in the past two years. 5. One of the reasons for the Euro crisis(欧债危机)is that many people hate  ▲   their living cost. 6.The sun   ▲     in the east and sets in the west. 7. Shopping online is popular among young people because they can enjoy fast  A  . 816.人和脊椎动物的运动系统由骨、骨连结和骨骼肌三部分组成.关节通常指骨与骨之间能够活动的连结,下面是关节的剖面模式图,请回答下列问题:(1)请标注图中标号所指的名称:[①]关节面.(2)图中[①]是骨之间相接触的部位,其上履盖着一层关节软骨;[③]由结缔组织膜构成,附着于[①]及骨面上,封闭[②].[②]内还有滑液,能减少[①]之间的摩擦.(3)骨是一种器官,骨的表面覆盖着骨膜,骨膜内层的成骨细胞,与骨的长粗和骨折后的修复有关.(4)人体的运动是以骨为杠杆、关节为支点、骨骼肌收缩为动力形成的.骨骼肌的收缩要受到神经系统的协调和控制.
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