乐乐和欣欣一共有160本书,已知乐乐和欣欣的图书本数比是5:3.乐乐有多少本书?
160×55+3,
=160×58,
=100(本);
答:乐乐有100本.
They insisted that he _____ present at the ceremony the next week.
A.be
B.has been
C.should have been
D.was
对照经验证据进行验证的预言就是主要假设。