铁矿石化学成分的波动，会破坏炉况顺行，并使焦比（），产量降低。A.降低 B.升高 C

单词拼写

根据下列句子及所给汉语注释, 写出空缺处各单词的正确形式.

1. Lisa, I didn't ______(认出)you-you've had your hair cut!     

2. I usually just have a _______(三明治)for lunch.                

3. Mr.White announced that he would go to China on _____(星期三).

4. The story was first written in English and later ______(翻译)into Chinese.

5.The village children like to go ______(游泳)in the nearby river.  

6. One of our _________(邻居)kept a very beautiful garden.      

7. Rice is grow in China, Japan and other        (亚洲)countries. 

8. David turned and walked off in the ______(相反)direction.    

9. Rose rushed _______(向楼下)to answer the door.            

10. Few students in my class can        (付得起) a trip to Zealand.

单子叶植物根茎的结构特点与双子叶植物根茎的不同点是什麽？

刚出生的新生儿白细胞总数为

A．21×109～28×10⁹/L
B．18×109～25×10⁹/L
C．13×109～18×10⁹/L
D．15×109～20×10⁹/L
E．10×109～15×10⁹/L

公文的格式具有规范性和相对确定性的特点。( )

目前世界上通常采用哪几种低温固结球团法？