The key is yellow.的同义句是:( )
A:The key yellow.
B:The is a yellow key.
C:This is a yellow key.
D:This is the key yellow.
— __________.
已知关于x的不等式(2a﹣b)x+a﹣5b>0的解集为x< 107,
(1)求ba的值.
(2)求关于x的不等式ax>b的解集.
①△ABC≌△EAD;
②△ABE是等边三角形;
③AD=AF;
④S△ABE=S△CDE;
⑤S△ABE=S△CEF.
其中正确的是( )