下列家用电器中，利用电流热效应工作的是 A．电视机 B．吸尘器 C．榨汁机 D．电熨斗
硅、铜、镓、硒等化学物质可作为制造太阳能电池板的材料。 (1)镓是ⅢA族元素，写出基态镓原子的核外电子排布式 。 (2)硒
Li Ming is a school boy .He is twelve .He lives in Shanghai .He studies in the No.3 Middle School .He gets up at half past five every day .He reads English and Chinese in the morning .He has breakf
将函数y=log2(2x)的图象F按a=（2，-1）平移到F′,则F′的解析式为（ ） A.y=log2［2(x-2)］-1 B.y=log2［2(x+2)］-
Having been attacked by terrorists, ________ . A. doctors came to their rescue B. the tall building collapsed C. an emergency measure was taken D. warnings were given to tourists
反比例函数的图象在 ()A．第一、三象限B．第二、四象限C．第一、二象限D．第三、四象限
小华找来《康雍乾三朝实录》《论军机处与极权政治》《“文字狱”的研究》三本书，计划写一篇小论文。下列最可能成为这篇论文题目的是( ) A
