环境污染中固体废物种类繁多，其中，按废物的化学性质可以分为（）。 A.有机废物和无机

用单词的适当形式填空。

1. Baby Becky_____(wash) the  dishes  every day.

2. Mrs. Smith is______(take)a bath now.

3. My hands ______(be) dirty.

4. She_____(take)a shower  in  the   bathroom now.

5. Li Ming____(go) to the kitchen.

用括号中所给词的适当形式填空,必要时可加助动词.请将答案填写在文后相应的横线上。

     Confucius _1_ (be) born on September 28, 551BC. Chinese regard Confucius as the greatest thinker

and also the _2__ (great) teacher. He __3____ (have) about 3,000 students. For more than 2,000 years,

Confucius' ideas __4___   (be) around in people's everyday life.  Now they __5__ (go) far into east and

south Asia. People can still hear __6___ (they) today.

     Why _7__ (be) his ideas so popular?  Because they help a lot in everyday life.  Confucius _8___(say)

young people _9__(take)care of the old. People should give up _10____ (think) of __11____ (they) and

work for others. As a great teacher, Confucius said all should go to school if they _12_ (can).

1. __________ 2. _________ 3. __________ 4. __________5. __________

6. __________7. __________ 8. __________9. __________10. __________

11. __________ 12. __________

简述长期大量应用糖皮质激素引起的不良反应表现？

中幼红细胞的胞浆呈嗜多色性的原因是（）

A.浆内血红蛋白尚未形成

B.RNA等嗜碱性物质占绝对比例

C.细胞发生退化变性

D.Hb趋多，而RNA渐少

E.Hb渐少，而RNA渐多

已知产量为10单位时，总成本为500；产量为11单位时，平均成本为51，那么边际成本为（）。

A.51

B.50

C.52

D.61

E.1