下列原始凭证中，属于单位自制原始凭证的有（）。
A.收料单
B.限额领料单
C.产品入库单
D.领料单
参考答案：A, B, C, D
I think this bike is a little better than that one, but the shopkeeper charged me almost_______ for it.
A．as many twice
B．twice as many
C．twice as much
D．as much twice
心血管疾病研究
