将全脂奶粉配成全奶按重量比为
A．1:2
B．1:4
C．1:6
D．1:8
E．1:10
参考答案：D
_____ to our dream universities, we should devote all our time to gtting well preprations for the 2011 National College Entrance Examinations.
A．Admitted
B．To be admitted
C．Admitting
D．To admit
植物通过光合作用，每年约滞留（）吨碳在陆地生态系统中。
A.1220亿
B.1200亿
C.220亿
D.20亿
