问题
填空题
按照磨机内研磨体的种类不同，磨机分为（）、（）、（）和（）。
答案
参考答案：钢球磨；辊式磨；无介质磨；辊压磨
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按照磨机内研磨体的种类不同，磨机分为（）、（）、（）和（）。
参考答案：钢球磨；辊式磨；无介质磨；辊压磨
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| Dear Robert, I hope you are well. Thank you for your last letter. You ask me about Mid-autumn Day. Now, let me 1 you something about it. Everyone in China likes Mid-autumn Day. It 2 comes in September or October. 3 that day, everyone eats mooncakes. A mooncake is a delicious, round cake. It 4 the moon. There are many different kinds of mooncakes. Some have nuts in them, 5 some have meat or eggs in them. My friend Li Lei likes mooncakes with meat. But I think the 6 with nuts in them are 7 . Han Meimei says the nicest cakes 8 Guangdong. At night, families often stay 9 the open air near their houses. There they 10 the moon, and eat the cakes. Mmm! How delicious they are! Yours, Sun Huimin | |||
| ( )1. A. speak ( )2. A. never ( )3. A. On ( )4. A. like ( )5. A. but ( )6. A. moon ( )7. A. delicious ( )8. A. hear from ( )9. A. under ( )10. A. look at | B. tell B. usually B. At B. likes B. until B. moons B. nicer B. comes from B. with B. look after | C. say C. sometimes C. For C. looks for C. and C. ones C. nicest C. is from C. into C. look for | D. talk D. not often D. In D. looks like D. so D. one D. bigger D. come from D. in D. look up |