问题
单项选择题
血液进入左心房的入口是
A．上腔静脉口
B．下腔静脉
C．冠状窦口
D．肺静脉口
E．左房室口
答案
参考答案：D
解析：左心房位于右心房的左后方，其后壁两侧各有一对肺静脉的开口，导入由肺回流的动脉血。左心房的出口为左房室口，向下通左心室。
搜题请搜索小程序“爱下问搜题”
血液进入左心房的入口是
A．上腔静脉口
B．下腔静脉
C．冠状窦口
D．肺静脉口
E．左房室口
参考答案：D
解析：左心房位于右心房的左后方，其后壁两侧各有一对肺静脉的开口，导入由肺回流的动脉血。左心房的出口为左房室口，向下通左心室。
| A. improve B. why C. if D. own E. listening F. easily G. memory H. out I. on J. give K. long L. everybody |
Music has a calming effect 小题3: mind, too. If we are stressed out, 小题4: to music can help us feel better. And people often relax after a 小题5: day by listening to their favorite music.
Music is also known to help people learn faster. This is 小题6: music is so popular in school. Children can remember things 小题7: in the form of songs. Even older students make their 小题8: little songs to remember difficult things for their exams.
Music is used to help 小题9:_ language skill of autistic(自闭症) children, as well as help them express themselves.
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