设集合A={x|﹣1≤x≤2}，B={x|0≤x≤4}，则A∪B=（ ）．
{x|﹣1≤x≤4}
目前国内用量最大、品种最多的混合炸药是（）炸药。
A.硝铵类
B.硝化甘油类
C.芳香族硝基化合物类
D.其他工业
—Are these your English books?
—No, ______ aren't. They're ______ English books. [ ]
A. it; they
B. these; he
C. they; her
D. their; she
