题目

下列反应中，改变反应物的用量或浓度，不会改变生成物的是(    ) A．铜和硝酸反应 B．二氧化碳通入氢氧化钠溶液中 C．细铁丝在氯气中燃烧 D．氯化铝与氢氧化钠溶液反应 答案：C     however；before； name； easy； worst；notice；also；twice； and； give         Parents always think their children are very special. They want others to  1 their children. For this reason,they sometimes give their children unusual 2 They may choose names such as Chelma,Ukiah,Brianna,or Elvira. There are some advantages about this practice. A child who is 3  an uncommon name may feel special from childhood. Sometimes we 4   remember people with unusual names more 5 than we remember people with ordinary names.         6 , unusual names can cause problems. They can be hard for teachers and friends to pronounce. They can also be hard to spell, 7 computers may automatically (自动Jft) change them. For example,Jule may become July. Some people may have a bad impression of the person who has an unusual name 8  they meet him. 9  of all,other children sometimes don’t like kids with uncommon names. The message for parents is, “Think  10 before you give your child an unusual name."1.       2.       3.       4.       5.      6.       7.       8.       9.       10.