题目

请根据汉语意思或英文首字母填写单词。 71. Studies show people are more __________ (可能的)to suffer from back problems if they always sit before computers. 72. The m_________ of us voted for Mr.Red, who then became chairman of the committee. 73. The vice president indicated that all a______ for the post should have a master’s degree. 74. Dust will ____________(堆积) in a deserted house. 75. He was c______ down when the procedure he had used to produce a mammal clone ended in failure. 76. Some countries began to reform their legal systems and _______ (禁止) research in17．一块布做上衣用去它的$\frac{4}{9}$，做裤子用去它的$\frac{3}{9}$．做上衣和做裤子共用去几分之几？还剩下这块布的几分之几？