∵ab=23，
∴a=23b，
∴ba+b=b23b+b=35．
故答案为：35．
While sometimes it’s necessary to have phone calls in public, loud phone conversations are not so .
A．believable
B．acceptable
C．considerable
D．approachable
乙数是甲数的87.5%，甲数：乙数=______，如果乙数是56，甲数是______．
