骨迷路因局灶性吸收并被富含血管和细胞的海绵状新骨所替代，继而血管减少，骨质沉着，形成

小明上学时走上坡路，速度为m千米/时，放学时沿原路返回，速度为n千米/时，则小明上学和放学路上总的平均速度为______千米/时．

One of my ______ is ______ at the famous music school. [ ]

A. dream; studying

B. dreams; studying

C. dreams; to study

D. dream; studies

免疫对人体有保护作用，但也并不总是有益的。[ ]

Currently 94% of Web users use either Internet Explorer or Firefox, but recently some new (71) have been developed that are beginning to attract attention. The browser Opera is becoming very (72) because of its speed, it is currently the world’s fastest browser, and because it is much smaller (73) existing browsers (it can almost fit on a single diskette). It can also (74) the last Web page you visited, so the next time you surf, you can start where you left off. And like the big two, you can get it for free; the catch is that you have to watch blinking ads in one comer, or pay ＄40 for the ad-free (75) of Opera.

A．version

B．revision

C．software

D．book

问答题：经济全球化形成的原因有哪些？（8分）你如何认识经济的区域集团化和经济全球化之间的关系。（6分）