如图是某同学探究凸透镜成像规律时观察到的现象，下列哪种光学仪器的成像原理与其相同
A、投影仪
B、照相机
C、放大镜
D、近视眼
答案：B
You are a project manager for a small project. Your project was budgeted for ￥500,000 over a six-week period. As of today, you've spent￥260,000 0fyour budget to complete work that you originally expected to cost ￥280,000.According to your schedule, you should have spent ￥300,000 by this point. Based on these circumstances, your project could be best described as （）
A.ahead of schedule
B.behind schedule
C.on schedule
D.having not enough information provided
#1炉磨煤机电机大修的主要工作步骤和内容？
