可致右心室压力负荷过重的疾病为()
A.高血压病
B.心肌梗死
C.肺动脉瓣狭窄
D.严重贫血
E.主动脉瓣关闭不全
参考答案:C
His father promised _________ him to visit the museum.
A.to take
B.take
C. taking
D.takes
在食品中残留期最长的农药是()。
A.有机氯
B.有机磷
C.氨基甲酸酯类
D.拟除虫菊酯类
E.杀菌剂