一定量的盐酸跟过量的铁粉反应时，为了减缓反应速度，且不影响生成氢气的总量，可向盐酸中加入适量的①NaOH固体 ②H2O ③NH4Cl固体 ④CH3COONa固体
Children are ________ to meet with challenges as they grow up so parents don't have to worry about it. A. possible B. due C. probable
Nuclear science should be developed to benefit the people _______ harm them. A. more than B. other than C. rather than D. better than
张师傅是某企业的高级技术工人，每个月的收入也非常可观，上个月财务部门扣税218．5元，请你计算下，张师傅上个月工资总数是多少？ Ａ．2290元
一I saw Ann _______ a green dress at the school meeting． 一I think she looks better _______ red． A．dressed；in B．put on；wear C．wearing；in
碱性锌锰电池的总反应是：Zn + 2MnO2 + 2H2O = 2MnOOH + Zn(OH)2，电解质是KOH。下列说法正确的是A．MnO2发生了氧化反应B．MnOOH中Mn元素的化合价为+3C．反应消耗
. Playing on a frozen sports field sounds like a lot of fun. Isn't it rather risky, __9 A. though B. also C. either
