小明足部受伤发炎,医生在其左臂静脉滴注抗生素,药物到达足部的途径是( )
①左心房;②右心房;③右心室;④主动脉;⑤肺动脉;⑥肺静脉;⑦上腔静脉;⑧下腔静脉;⑨股动脉;⑩左心室.
A:①③④⑥②⑦⑧⑨⑩
B:⑦②③⑤⑥①⑩④⑨
C:⑦②③⑤⑥①⑧④⑨
D:⑦②③⑥⑤①⑩④⑨
蚂蚁的生活范围很大,校园里、花坛边都可以找到它们( )
Basketball is a very popular game in China . Some people like playing it . ZhangLei and LiQiang are very good at playing basketball . Tomorrow they are not going to have lessons . They would like to watch a basketball game . This kind of football is popular around the world .
19世纪80—90年代中外签订的不平等条约与19世纪40—50年代签订的相比,最根本的不同是( )