题目

—Is this       book you were telling me about? —Yes,it is about        life of Queen Victoria. A.the;the                      B.a;a                            C.the;a                         D.a;the 答案：A 解析: 两空后的名词后均有定语限定，故为特指，应用定冠词。将下面用分析法证明a2+b22≥ab的步骤补充完整；要证a2+b22≥ab，只需证a2+b2≥2ab，也就是证 ，即证 ，由于 显然成立，因此原不等式成立．