问题
选择题
"______ do you exercise?" "Three times a week." [ ]
A. How long
B. How often
C. How far
D.How many
答案
答案：B
搜题请搜索小程序“爱下问搜题”
"______ do you exercise?" "Three times a week." [ ]
A. How long
B. How often
C. How far
D.How many
答案：B
，读作____________kw·h。若他家用电器的总功率是800W，平均每天使用3小时，那么月底（30天计）他家电能表的示数为____________kw.h。