A:(﹣x+1)(x﹣1)
B:(﹣x﹣1)(x+1)
C:(﹣x﹣1)(﹣x+1)
D:(x﹣1)(1﹣x)
(report报告;umbrella雨伞)
Cities
Weather
Beijing
It's sunny, but it will be ____ in the afternoon.
Qingdao
The weather is fine and ____.
Harbin
It's snowy and ____.
Xi'an
It's sunny and warm.
Guangzhou
It's ____ and ____
在干燥的天气里,用干毛巾擦镜子,镜子表面上往往粘有很多“毛毛”,这是因为镜子表面带了____ ,这种现象叫做____ ,这种现象的实质是____ 。