______不利于钙的消化与吸收。
A．柠檬酸
B．草酸
C．单宁
D．植酸
参考答案：B,C,D
委托监理合同约定，涉及设备工程设计、制造各方的组织协调工作由( )负责。
A．业主 B．监理单位 C．总承包人 D．设计单位
—You shouldn't have gone there alone last night. —But I ______. Philip went there together with me.
A. didn'tB. hadn'tC. wouldn'tD. wasn't
