650加上11与30的积，再除以35，商是多少？
（650+11×30）÷35，
=（650+330）÷35，
=980÷35，
=28；
答：商是28．
The two little girls _____ good friends but for the attack of some outside force. [ ]
A. could have been
B. had been
C. were
D. must be
下列不属于新增无形资产的是（）。
A．土地使用权
B．专利权
C．勘察设计费
D．专有技术
