题目

已知实数a，b，c满足，则（ ）A. B. C. D. 答案：【答案】B【解析】根据题设条件可得，根据不等式的性质可得正确的选项.因为，所以，，再根据，可得，所以，由于，大小不确定，所以A，C不正确，由，可知，D不正确，故选：B.– Whose notebook is this? -- It _____ Tom. I saw he used it just now. A. must belong to         B. can’t belong to         C. might be belonged to