合同中违约责任的规定是为了（）。
A.促使当事人履行合同义务
B.免责
C.维护市场交易秩序
D.补偿因违约而给对方造成的损失
参考答案：A, C, D
_______ she was invited to the ball made her very happy.
A．Whether
B．That
C．Because
D．What
怎样进行新原料、新工艺的推广和运用？
