问题
单项选择题
对于原矿品位高的矿石，为了充分回收金属，确定选别次数的原则是（）。
A、增加粗选次数
B、减少粗选次数
C、增加扫选次数
答案
参考答案：C
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对于原矿品位高的矿石，为了充分回收金属，确定选别次数的原则是（）。
A、增加粗选次数
B、减少粗选次数
C、增加扫选次数
参考答案：C
| Cloze test. 完形填空。 |
| Look at the picture of 1 room. 2 are white and the windows are big. 3 the wall you can see 4 old picture of her family. 5 the picture Ann sits on the floor. 6 father and mother 7 behind 8 . Her father is 9 . He has blue 10 . Her mother is Chinese. She has black eyes. |
| ( ) 1. A. Ann ( ) 2. A. The Wall ( ) 3. A. On ( ) 4. A. a ( ) 5. A. On ( ) 6. A. She ( ) 7. A. am ( ) 8. A. she ( ) 9. A. English ( ) 10. A. eyes | B. a Ann's B. Walls B. In B. an B. In B. Her B. is B. her B. an English B. shirt | C. Ann's C. The walls C. Of C. the C. Of C. Your C. are C. him C. a English C. bag | D. an Ann's D. The wall D. At D. / D. At D. My D. do D. he D. the English D. skirt |