题目

若=2，则a的值为（ ） A.         B. 4              C.         D. 答案：B 【解析】 解：若=2，则a=4， 故选：B． 根据算术平方根的概念可得． 本题主要考查算术平方根，解题的关键是掌握算术平方根的定义．用所给短语的适当形式填空abundant in, a great deal, out of the question, in the company of, a variety of, for all ages and tastes, close up, parallel to, settle in, day in and day out【1】 Tibet is a land __________ a diversity of minerals. 【2】 You can't go to the wedding in that old shirt—that's quite __________. 【3】 She cooked __________ and did cleaning for forty years. 【4】 TRAVEL JIU ZHAIGOU offers tour __________Everyone no matter he is young or old will enjoy it. 【5】 As for maths , he knows __________ more than I do. 【6】 The painting looks better from a certain distance than __________【7】 The girls come from __________ different back-grounds. 【8】 The road runs __________ the railway. 【9】 His uncle chose to __________ the countryside. 【10】 He had a pleasant evening __________ friends .