工艺规程规定了合理的加工方法步骤及所用的设备和工、卡、量、器具等。
参考答案：对
有关唇系带的叙述下列哪项不正确（）。
A.上唇系带较下唇系带明显
B.义齿基托边缘应注意此关系
C.随儿童生长，唇系带逐渐缩小
D.上唇系带不会与切牙 * * 相连
E.宽大的上唇系带可致上中切牙间隙
It has been proved _____ eating vegetables in childhood helps to protect you against serious illnesses
in later life. [ ]
A. if
B. because
C. when
D. that
