误差主要分为（）。
A、系统误差
B、人为误差
C、随机误差
D、过失误差
参考答案：A, C, D
— Zhejiang University is very famous in the world.
— Yes, _____ the students in Zhejiang University are from foreign countries.
A．Seven hundreds of
B．Seven hundreds
C．Seven hundred of
D．Hundred of
果实是由_________ _____和_______________组成。
