肺泡表面张力来自（）

A．肺泡表面活性物质

B．肺泡表面流体薄层

C．肺泡上皮细胞层

D．间质

E．毛细血管基膜和毛细血管内皮细胞层

用括号中所给单词的适当形式填空。

                                         New Year's Resolution Survey Results

     We got over l, 000 letters,  1. ______ (fax) and e-mail from our 2. _______(read) about their

New Year's resolutions. Many readers are 3. ______ (go) to work harder in school this year. Lots

of readers are going to play 4. ______ (sport). Some readers are going to eat 5. ______ (many)

vegetables. A few readers are going to learn a new language. Some girls are going to exercise 6. ______ (much) to keep fit.  Some 7. ______ (parent) are going to study the subjects their 8. ______ (child)

learn at school. They want to communicate 9. ______ (good) with their kids. An old lady is going to

look for a job as a 10. ______ (teach) in China next year.