蔬菜和水果中含量较低的是
A．水分 B．脂肪C．矿物质 D．粗纤维E．维生素
参考答案：B
The situation in the Middle East is so ______ that we have to be ______ when dealing with the hostage issue. [ ]
A. complex; cautious
B. difficult; anxious
C. mixed; careful
D. mild; eager
不能作为不溶性骨架片缓释骨架材料的高分子聚合物有
A．海藻酸钠B．ECC．CA2D．乙烯/醋酸乙烯共聚物E．无毒PVC
