下列关于填料塔盘的塔填料特点说法错误的是（）。
A.气液接触面大
B.传质系数高
C.通量大而阻力小
D.空隙率低
参考答案：D
More and more Chinese people follow the practice _____ they will travel to various scenic spots to enjoy the scenery in their leisure time. [ ]
A. whether
B. which
C. where
D. that
什么是生物工程（学）？它由哪5大具体工程组成？它们间的相互关系是怎样的？
