阅读理解
A
Good morning. I am Professor Armstrong, and I am your laboratory instructor .This class is intended as a necessary part of the course, which Dr Smith will be in charge of. This class will meet twice a week .This laboratory begins at nine. I expect you to be on time. I do not intend to wait for the latecomers or repeat what has already been cohered if you miss the explanation. And do not arrive late and interrupt your neighbor. You may as well not come if you can't be on time.
Attendance is equally important. If you miss three lab classes, you're dropped from the labs—no excuses. You can't complete the course without completing the lab.
Besides, safety is key here. It's very important to keep things neat and clean, dress properly,
