大于3/4小于（）个筛孔尺寸的颗粒为难筛颗粒。
参考答案：1
A team of American scientists has found a treatment to protect humans from the deadly H5N1 flu virus, ________ brings great ________ to the world.
A．that; appearance
B．which; relief
C．which; advantage
D．that; profit
下列说法正确的是（）。
A．有国家就有法制
B．有国家就有法治
C．有法制就有法治
D．有法制不一定有法治
