根据下表所提供的数据,在标准大气压下,以下判断正确的是( )
物质
熔点/℃
沸点/℃
酒精
﹣117
78
水银
﹣39
357
铅
328
1740
A:80℃的酒精是液态
B:铅的凝固点是﹣328℃
C:﹣39℃的水银吸热,温度可能不变
D:气温接近﹣50℃时.寒暑表应选用水银做温度计
A: ____
B:Yes. These shoes are very nice. ____
A: ____ Here you are. Are they OK?
B:They're too small.
A:Hmm. OK. ____
B:Let me try. ____
A:Good!
A. How about size 8?
B. They're just right.
C. Can I help you?
D. Of course.
E. Can I try them on?
假如你是法官,你将如何判决?并请说明判决理由。
等比数列an中,a1=1,a5=-8a2,a5>a2则an=( )