粘土造浆率的大小受粘土()因素的影响。
A、带电性质
B、吸附阳离子的类型
C、水化性
D、全都是
参考答案:D
When he heard the good news, he was _____ happy that he cried. [ ]
A. very
B. such
C. so
D. too
图示结构,各杆EI为常数,为()。
A.3EI/(200l)
B.3EI/(200l)+Pl/2
C.3EI/(400l)
D.3EI/(100l)-Pl/2