在C语言中，错误的int类型的常数是( )。
A．32768 B．0C．037 D．OxAF
参考答案：A
______ difficult the problem was, he tried his best to solve it.[ ]
A. No matter
B. Although
C. Whatever
D. However
可作为水凝胶骨架材料及薄膜包衣材料
A．Poloxamer 188B．PEGC．PVPD．CarbopolE．HPMC
