扁平足的病因是() A.内弓下陷 B.外弓下陷 C.前弓下陷 D.后弓下陷 E.内弓 发布时间:2017-05-15 01:25 │ 来源:www.tikuol.com 题型:单项选择题 问题: 扁平足的病因是()A.内弓下陷B.外弓下陷C.前弓下陷D.后弓下陷E.内弓平直
题型:单项选择题 He was very ____ to find his suggestion ____.A.disappointed; to be turned downB.disappointing; turned downC.disappointed; turned downD.disappointing; turning down 查看答案
题型:单项选择题 如图是一个为警报器装置的逻辑电路图.RT是一个热敏电阻,低温时电阻值很大,高温时电阻值很小,R是一个阻值较小的分压电阻.当温度 (填“升高”或者“降低”)到一定程度,电铃就会报警。为了提高电路的灵敏度,即将报警温度调的低些,那么R的值应该调 (填“大”或者“小”) 查看答案