①注视物镜,用手调节粗准焦螺旋,使镜筒下降
②看到物体图像后,调节细准焦螺旋,直到物像清晰
③将所观察的玻片标本放在载物台上
④左眼注视目镜,并用手调节粗准焦螺旋,缓慢地提升镜筒
—Where are you from?
—I'm from the UK.
Most of my friends, _________ Sandy, Jimmy and Angela,are all kind to me.