【单选题】________ the production up by 60%, the company has had another excellent year.
【单选题】下列有关光学知识的叙述正确的是( )
C.
投影仪是利用凸透镜成放大、正立的实像的原理制成的
【单选题】司机对信号灯的关注是行车安全的重要环节。下列有关视觉形成过程的叙述正确的是
C.
形成信号图像和视觉的部位分别是脉络膜和视觉中枢
D.
信号灯光线进入眼球的顺序是角膜→瞳孔→晶状体→玻璃体→视网膜
【单选题】_______ the production up by 60%,the company has had another excellent year.