2张纸可以做8道计算题，5张纸可以做几道？
8÷2×5=20（道）
对于高速公路，标准贯击次数小于4且含水量大于30%的( )统称为软土。
A．黏土
B．砂性土
C．粉土
D．细粒土
Does it always matter if the "real world" is not being practised in the classroom Why or why not
