问题
选择题
I want to know __________. [ ]
A. where does our teacher come from
B. where our teacher come from
C. where our teacher comes from
D. where does our teacher come
答案
答案：C
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I want to know __________. [ ]
A. where does our teacher come from
B. where our teacher come from
C. where our teacher comes from
D. where does our teacher come
答案：C
下表是某校初三(1)班20名学生某次数学测验的成绩统计表(见表3.1.1)
若这20名学生成绩的平均数为82分，求x+y的值( )．
| 成绩(分) | 60 | 70 | 80 | 90 | 100 |
| 人数(人) | 1 | 5 | x | y | 2 |
A．9
B．10
C．11
D．12
E．(E) 13