The midpoint and equivalence point for carbonic acid are much higher.碳酸滴定中点和等量点也高得多.If a vibrating string is lightly touched at its midpoint , its pitch goes up an octave.如果在一根振动弦的中部轻轻一触, 它就发出高八度的音.The centre mark is ind...
...Bryan Sutton, who seconded the motion against fox hunting...赞同反对猎狐动议的布赖恩·萨顿That is our math teacher, Mr. Sutton.那是我们的数学老师sutton先生.That is my math teacher, Mr. Sutton.那是我的数学教师Sutton先生.He was a constable at Sutton polic...
Have you got your crayons? Have you got your sketch - book?你得到你的粉笔的 吗 ?你有草图书 吗 ?Children enjoy colouring, eg with crayons.儿童都喜欢涂颜色(如用蜡笔).The little girl was coloring pictures with crayons.这个小女孩正在用蜡笔在图画上涂颜色.I need some ch...