2003-2007年，乙国的年碳排放量最大值与最小值之间的差距为：
A. 7亿吨
B. 8亿吨
C. 9亿吨
D. 10亿吨
查看答案
与2006年相比，2008年全国各海区倾倒疏浚物是2006年的：
A. 172.9%
B. 137.3%
C. 72.9%
D. 37.3%
【B12】
A. particular
B. similar
C. general
D. common
【B6】
A. bargain
B. trade
C. deal
D. transaction
A．She doesn't know when his classes begin.B．She's surprised that he chose that company
A. She doesn't know when his classes begin.
B. She's surprised that he chose that company.
C. She doubts he makes much money now.
D. She wonders why he's not returned to school.
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