题目

【1】You should be_______enough to face your life. (勇敢的)【2】Give every day a ______to become the most beautiful of your life. (机会)【3】The teens took a photo of smiling faces to welcome World Smile Day in______. (五月)【4】Luckily, Daniel was chosen to be the _______________(秘书) of the Students’ Union.【5】Many foreigners enjoy Chinese fashion, ________ (尤其) the Tang costume.【6】American schools have many courses, ______(相似的) to those in Canadian schools.【7】We don’t think it is______(必须的，必要的) to give students too much homework. They某固体混合物可能含有氯化钠、木炭粉、氧化铜、铁粉中的一种或几种，为确定其组成，现进行如下图所示的实验：请回答下列问题：（1）混合物中肯定含有______．（2）写出有关步骤的化学方程式①______ 2Cu+CO2↑