Помогите с олимпиадным тестом, пожалуйста. 1. Many metals can be __________. A) melted and reduced B) melting and reducing C) melt and reduce D) melts and reduces 2. Surgical instruments _________ high-carbon steel. A) are made of B) are made from C) are made D) made 3. The main properties of glass ____ transparency, viscidity and brittleness. A) is B) are C) was D) were 4. I think, gas-metal welding is _________ than submerged Arc because submerged-arc can be used only with steels. A) effective B) effectively C) more effective D) the most effective 5. Look at speedometer! The car _______ extremely fast! A) moves B) moved C) is moving D) move 6. Indicators are the lights that _______the direction of the car. A) shows B) showing C) show D) showed 7. You can see that they _____ piercing dies for punching holes recently. A) uses B) using C) use D) have used 8. He ______ on milling machine when the cutter suddenly broke. A) was working B) work C) worked D) works 9. Composite materials are being used for building of bridges ____ have unique mechanical and physical properties. A) who B) that C) whom D) how 10. Ductile materials ______absorb energy. A) may B) ought to C) can D) must 11. Our factory has got ______equipment that was improved lately. A) a B) an C) a piece D) a piece of 12. The resistance material in the contact zone depends ______ the hardness of parts and the geometric shape of the contacting surfaces of the parts. A) on B) of C) for D) from 13. I forgot _______ a fan belt in my car. A) change B) to change C) changed D) am changing 14. Polyvinyl chloride considers _______ vinyl chloride, concentrated acids and alkalis and alcohols. A) many B) much C) few D) a lot of 15. Polythene consists ____ ethane. A) on B) of C) with D) by