题目

完形填空     阅读下面短文，掌握其大意，然后从41---55各题所给的A、B、C、D四各选项中，选出一个最佳答案。 Sudan Chandran, a classical dancer from India, was cut off in the best of her career when her right leg had to be cut off after a car accident. Though the accident  (1) her bright career to a stop, she didn’t give up. In the painful months that followed, she met a  (2)  who developed an artificial limb (假肢) made of rubber filled with sponge(海锦). So strong was her will that she decided to go (3 )  to dancing after she had been fit下列说法中正确的是 [     ]A．油脂的相对分子质量较大，属于高分子化合物 B．油脂在碱性条件下水解比在酸性条件下水解更容易发生 C．油脂里烃基的饱和程度越大，其熔点越低 D．不含其他杂质的油脂是纯净物