下面有一种性质与其他三种性质有本质的区别，它是（ ）
A．颜色
B．气味
C．状态
D．可燃性
答案：D
It's absolutely unacceptable to sacrifice people's life and health ________ the economic development in
any case.[ ]
A. in hope of
B. in exchange for
C. in face of
D. in need of
填充墙砌筑时应错缝搭砌，蒸汽加压混凝土砌块搭砌长度不应小于砌块长度的（）
A.1/2
B.1/3
C.1/4
D.1/5
