加热时由于气体介质和钢铁表层碳的作用，使表层含碳量降低的现象称为脱碳。（）
题型：判断题
问题：
加热时由于气体介质和钢铁表层碳的作用，使表层含碳量降低的现象称为脱碳。（）
题型：判断题
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From Monday to Friday most people are busy wo rking or studying, and in the evening andweekends they are free and (1)______ themselves. Some watch television or go to the movies, and others (2)______ sports. This is decided by their own interests. Almost everyone has some kind of hobby. It may be something from collecting stamps to (3)______ model planes. Some hobbies are very (4)______, but others don't cost anything at all. Some collections are worth a lot of money, others are valuable(有价值的) only (5)______ their owners. I know a man who has a coin collection worth several (6)______ dollars. A short time ago he bought a rare(罕见的) fifty-cent piece which (7)______ him $ 250! On the other hand, my youngest brother collects match boxes. He has almost 600 of them, but I wonder (8)______ they are worth any money. (9)______, to my brother they are quite valuable. Nothing makes him (10)______ than to find a new match box for his collection. That's what a hobby means, I think. It is something we like to do in our free time just for the fun of it. | |||
| ( )1. A. love ( )2. A. look like ( )3. A. make ( )4. A. interesting ( )5. A. to ( )6. A. thousand ( )7. A. paid ( )8. A. that ( )9. A. So ( )10.A. good | B. work B. take care of B. making B. exciting B. with B. thousands B. cost B. if B. If B. happier | C. enjoy C. think about C. buying C. cheap C. on C. of C. took C. what C. However C. faster | D. play D. take part in D. trade D. expensive D. in D. thousand of D. spent D. why D. And D. quick |