A:铁在硫蒸气中燃烧
B:H2S在空气中燃烧
C:二氧化硫通入澄清石灰水
D:硫酸中加入锌粉
主要分布在30°~40°之间的大陆西岸的气候类型是 ( )
too, lost, red, first, English, eraser, find, number, must, last
Hi, I'm Jenny Brown. Jenny is my ____ name. Brown is my ____ name. I'm an ____ girl. This morning I ____ my pencil box in the library. I ____ find it. My pencil box is ____. In it, you can see an ____ and a set of keys. If you ____ my pencil box, please call me. My telephone ____ is 765-0652. You can e-mail me, ____. My e-mail address(地址) is jenny 1256@ 126.com. Thanks!
一质点作匀变速直线运动,第5s末速度为v,第9s末速度为﹣v,则质点在运动过程中( )