Choose the right safety equipment for different occupations. a.strong boots b.a hard hatc.protectivesuit d.a special vest with reflective material e. earplugsf. eyewear g.vinyl gloves 1.To civil engineers, (1)________ isthe mustand they alsohas to wear (2)_______when working at night. 2.Radiologistsshould alwaysworkunder time limitwearing (3)________to avoid contact with harmful radiation for long 3.Electrical engineers have to work in a clean roomprotective suit together with eyewear and (4)_______ so as not to make damage to the delicate Led components. 4.To production engineers,(5)______is essentialat work together with (6)_______ to protect their hearing.
举一反三
- The engineers spent the whole night(work) ___________on the new device.
- 假定有两个关系R与S,其内容分别为: R关系 S关系 A B C B C D 1 2 5 2 5 17 2 5 6 2 5 9 3 5 4 5 4 1 (πA,B(R))×(πC(S))的运算结果为 ______。 A.A B C 1 2 5 1 2 4 2 5 5 2 5 4 3 5 5 3 5 4 B.A B C D 1 2 5 17 1 2 5 9 3 5 4 1 C.A B C S.B S.C D 1 2 5 2 5 17 2 5 6 2 5 9 3 5 4 5 4 1 D.A B C 2 5 6
- The scenes have to be filmed many times because () A: it takes a long time to make a film B: it is often difficult to make them just right C: many people work together D: the film is poor
- The purpose of the author's story is to tell us that ________. A: in the old days engineers had to work hard to succeed B: good engineers should always be practical C: sometimes hard work won't help you achieve your goal D: the road to success is never easy
- 下面是关于脂肪酸氧化的部分反应步骤, A: (2)(4)(1)(3)(5)(6) B: (4)(5)(2)(6)(3)(1) C: (3)(2)(1)(6)(4)(5) D: (4)(2)(3)(1)(6)(5) E: (5)(2)(6)(3)(1)(4)