长期停用的制冷压缩机再次启动时,能量调节装置应处于()。
A、“0”
B、“25%”
C、“50%”
D、“100%”
参考答案:A
若将文本字符串"15"、"8"、"6"按降序排序,则排序的结果为( )。
A."15"、"8"、"6"
B."6"、"8"、"15"
C."8"、"6"、"15"
D."8"、"15"、"6"
Your brother has washed all the clothes by himself, _______?[ ]
A. is he
B. does he
C. doesn’t he
D. hasn’t he