三角形一边长为10,另两边长是方程x2-14x+48=0的两实根,则这是一个________三角形,面积为________.
Can I _________ the TV, Dad? I want to watch the sports news. A.turn off B.turn on C.turn down D.turn up
Mr. Smith is considering ______ a computer, which is considered ______ a great help in our work and study. A. to buy; to be B. buying; to be C. to buy; being D. buying; being
如图所示，在x＞0，y＞0的空间中存在匀强磁场B，磁场方向垂直纸面向里。在y轴上距离坐标原点为R的地方有一简单的电子枪，电子加速极板间的距离为d
牛路岭水电站，一部机组装机容量为11000KW，发电机输出电压5500V，用一台升压变压器向某市供电，输送电压110kV，输电线总电阻为20??，到用户端再用一
血浆成分和原尿成分相比是血浆中有（ ） A．大分子的蛋白质 B．水 C．无机盐
They are putting too much carbon dioxide into the atmosphere, ______ prevents heat from escaping from the earth into space. A. what B. that
I was an angry adolescent in my first year of college . In my eyes , my father seemed to 41 me in no way . One day we had a serious fight . I saw my father as 42 me and wanted to b
