1吨货物56和5吨货物的16相等．
故答案为：√．
— Do you know something about Kwanzaa?
— It is _____festival celebrating the culture and history of African Americans.
A．a seven-day
B．a seven-days
C．a seven day
D．seven days
我国第一条开工建设的高速公路是那一条？
