下列哪些食物可增进铅在肠道的吸收（）
A.单宁
B.果胶
C.纤维素
D.酒
E.牛奶
参考答案：D, E
解析：酒和牛奶可增进铅在肠道的吸收。
President Hu Jintao urged every effort ________ to rescue and treat the injured German tourists in a traffic accident in Tianjin on the morning of Oct1, 2012.
A．is made
B．must be made
C．be made
D．should make
劳动保护用品按其防护部位分为（）类。
A.5
B.6
C.7
D.9
