拖拉机带铧式犁作业时，在主犁体上起入土和切土作用的是（）。
A.犁托
B.犁侧板
C.犁壁
D.犁铧
参考答案：D
________, what she had devoted herself to resulted in nothing but failure.
A．To her much disappointment
B．To her great disappointment
C．Great to her disappointment
D．To her disappointment much
国际多式联运提单发生转移后，发货人的责任（）
A.相应解除
B.不能改变
C.根据经营人的意图改变
D.根据情况改变
