If the ratio of the degree of exterior angle of ∠A,∠B and ∠C
that are in the triangle ABC is 5:4:3,then the ratio of the degree
of ∠A,∠B and ∠C is ()
A、5:4:3 B、3:4:5 C、1:2:3 D3:2:1
对有理数a,b,有以下四个判断:
①若|a|=b,则a=b;②若|a|>b,则|a|>|b|;
③若,则
;④若|a|<|b|,则a<b;
其中正确的判断的个数是( )
A.1 | B.2 | C.3 | D.4 |
两个直角三角形如图放置,则∠BFE与∠CAF的度数之比等于( )
A.8 | B.9 | C.10 | D.11 |
若a的负倒数的相反数是8,b的相反数的负倒数也是8,则( )
A.a=b | B.a<b | C.a>b | D.ab=1 |
设,则
的整数部分等于( ).
A.4 | B.5 | C.6 | D.7 |