下列现象描述中,正确的是( ) A.铁丝在空气中剧烈燃烧,火星四射,生成黑色固体 B.硫磺在空气中燃烧产生淡蓝色火焰,生成二氧化硫气体 C
与美洲印第安人属同一人种的是( ) A.日本人 B.欧洲人 C.阿拉伯人 D.撒哈拉以南的非洲人
—Sandy,can you tell me ________?—Sorry,I’ve no idea.A.how many guests have been hereB.when is the partyC.why did they comeD.where will they leave
取一块新鲜的海带,放在成有清水的烧杯中加热,随着温度的升高,海带将会变成什么颜色?( )A.黄色B.绿色C.红色D.不变
霍布斯鲍姆在《帝国的年代》中对欧洲某强国做了如下记载:最惊人的变化首推出现了许多以女性为主要从业人员的职业:商店和办公室中的职业。…
修改下列语句中画线的部分,使之与其前句构成整句。(不能改变原意,可适当更换词语) 上海已悄然出现了为顾客丰富切身体验服务的“体验经济”的
第一节 完形填空(共10小题;每小题1.5分,满分15分) Trees are useful to man in three very important ways. They provide him with wood and other __21__ ; they give him shade; they he
The teacher came to the classroom and demanded ____ what had happened. A. his students to tell him B. being told C. telling him D. to be told