题目

 Saving the earth is too hard for _____ individual, but every little thing you do makes _____ difference. A. an; a                        B. the; /                 C. the; a                                 D. /; the 答案：A我国与一月份0℃等温线相一致的等降水量线是（　　）A．1600mmB．800mmC．400mmD．200mm