题型:选择题 There are lots of problems in your hometown, but we're happy to see many of them___________.A.are solvingB.are solved C.have solvedD.are being solved 查看答案
题型:单项选择题 肥胖给心血管系统带来不利的负担,体重超重5公斤,心脏的负担即增加()%。吸烟者的冠心病发病率较不吸烟者高()倍,尼古丁可使冠状动脉痉挛,加重猝死的风险.A.52.5B.103.6 查看答案