【单选题】
The old man returning home after eight years absence to find that all the neighbors he had known were no longer there. Is this a complete sentence?
【单选题】
15.The book was so interesting that he had read it for three hours ______ he realized it.
【单选题】
I have an appointment_________ 15 minutes.
【单选题】
After the war, a character called Uncle Sam began appearing in political cartoon, his from ____ from an earlier cartoon character called Brother Jonathan.
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/8592F581846CA714AADA89A876F80905.png title=15.png alt=15.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/185FCE69420E9A3266F53A853ACD5EFC.png title=15-1.png alt=15-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/C21C8472C669C4FEE1D21D21F5D1555A.png title=15-2.png alt=15-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/95E60807FFFDEBD25E95B80F41B7FD9E.png title=15-3.png alt=15-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/F39F1CAD0D156408D65F9EFBF74E514E.png title=15-4.png alt=15-4.png/>
【单选题】
15.Man _____ die without air or water.
【单选题】
15.心脏的大体解剖结构是
①
A.心腔分为右心房、左心房及右心室、左心室。心壁分为心外膜、,心肌和心心膜
②
B.心传导结构包括窦房结、房室结、房室束:房室束左右脚及其末端形成的浦肯野氏
纤维
③
C.全身静脉血经由右心房、右心室、肺动脉(含静脉血)流人肺,交换气体后,通过
肺静脉(含动脉血)流人左心房、左心室,再通过主动脉流往全身各组织器官.