小明用弹簧测力计、圆柱体、两个相同的圆柱形容器，分别装有一定量的水和盐水，对浸在液体中的物体所受的浮力进行了探究，其装置和弹簧测力计示数如图所示．

生物能发展进化．就生物本身来看，生物进化的关键因素是生物性状能遗传．（判断对错）

角α的终边上有一点P（m，5），且cosα=$\frac{m}{13}$(m≠0），则sinα=（　　）

    Look ! This is a nice photo.

    This is a boy, ____name is Tony. That is a girl,____ name is Jenny. They are my friends.____am a girl. That is my teacher. His ____name is Smith. We call（叫） him Mr Smith. His ____name is Peter. The woman (妇女) is Miss Zhang .____ is our English teacher. So you can see ____people (人) in this photo. If you need any help, you can ____ Mr Smith at Peter g2 @gfim.com.