对于周转材料的取样和送检不低于（）次。
A、1
B、2
C、3
D、4
参考答案：B
24.—I don’t think I need to buy that toy penguin—it’s for kids.
—__________you don’t have kids, buy it anyway because it looks good.
A．As if
B．Even if
C．In spite of
D．Even so
下列哪个城市不是经济特区
A．深圳
B．珠海
C．厦门
D．长沙
