超星 - 5.1.2视频作业 - 查题吧

填空题

1A 2B 3 C4D5E6 F7G8H9I10J

填空题

Match the expressions with the concepts. (20 points; 5 for each)1. allowed to ___ a. this is prohibited2. Must b. this is obligatory3. mustn’t_ c. this is not obligatory4. don’t have to _____ d. this is permitted

填空题

Stephanie: Hi. I’m Stephanie. I’m a 1)____ . I’m currently working on a large tunnel project in the north of the country. We don’t have to wear any special clothes but 2)_are recommended. I’m often working close to cranes and other big machines so I have to wear a3)at all times. When we work at night, I have to wear a special 4)so that people can see me.Greg: My name is Greg. I’m a radiologist. At the moment I am doing some research into the use of X-rays and gamma rays in the diagnosis and treatment of disease. In my work I handle radioactive material. To avoid exposure to harmful radiation, we have to wear 5)____and, sometimes we work behind a 6)_ . We must not be exposed to radiation for long periods and so there are strict time controlsCarol: My name is Carol. I’m an electronic engineer. In my present job, I manufacture LEDs. The components are very small and delicate. They can be damaged by just one speck of dust. Everything in my workplace must be extremely clean. So I have to work in a clean room, which is a space where the particles in the air and the humidity are strictly controlled. We mustn’t let any dust or moisture come into contact with the components. So I have to wear a special suit with a 7)over my mouth and vinyl 8). When we’re not in the clean room, we can wear our normal clothes.Tomas: My name’s Tomas. I’m a production engineer. At the moment I’m coordinating the installation of heavy machinery at a new car manufacturing plant. Factories are very noisy places so one thing that is essential in this place is 9)which you must use to prevent serious damage to your hearing. Oh, and your hard hat. You have to wear a hard hat at all times. There is no real 10)_where I work. I mean, you don’t have to 11)__ . Of course, you can if you want to but I normally don’t bother.[音频]

1