家中经常使用的物品中属易燃易爆物品的是（）A、摩丝 B、餐洗剂 C、洗发水

只列式不计算。

四、五、六年级的同学去植物园，四年级有84人，比五年级少4人，六年级去的人数比四、五年级人数的和还多4人。六年级有多少名同学去植物园？

As we all know, music is p___小题1:____ the most importantpart in our day-to-day lives. Some songs can ___小题2:____ (激励) us and drive us forward, while _____小题3:_____ may remind us ___小题4:__ the people whom we love. Many important occasions like those of ___小题5:____ (婚礼) or sports and games have their special music. Every nation has its n____小题6:___ anthem. With years p_____小题7:___ by, music grows and changes.Modern science has also changed music. Inventions like records, radios, movies, ___小题8:____ (电的) instrument, tapes,recorders and videos have changed the way in ___小题9:___ we play and listen to music; they have h___小题10:_____ to make music an important form of international communication.

汉代高级主管官吏或地方郡守以上的官吏在其辖区内对有名望的又有统治才能的人，向中央举荐的制度叫做（）。

制造战斗机，质量越小越灵活，据此应选用密度较______，但硬度较大的铝合金；落地式电风扇，底座质量越大越稳定，据此应选用密度较______而成本较低的铸铁较合理．

将60℃的硝酸钾饱和溶液降温到10℃时，有晶体析出（晶体中不含水），下列各量没有发生改变的是  [ ]

A、硝酸钾的溶解度

B、溶液的质量分数

C、溶液中溶质的质量

D、溶液中溶剂的质量