不属于艾滋病的传播途径（　　）

把一刚摘下的果树枝装在小瓶中，如图所示，用弹簧秤测得重为50克，光照6小时后，测得重为45克，重量减少的主要原因是（    ）

填入下面文段空白处的词语，最恰当的一组是（    ）

    中国人  ①  主张“世界大同，天下一家”。中国人民  ②  希望自己过得好，也希望各国人民过得好。当前，战乱和贫困  ③  困扰着部分国家和地区，疾病和灾害  ④  时时侵袭着众多的人们。我真诚希望，国际社会携起手来，  ⑤  人类命运共同体的理念，把我们这个星球建设  ⑥  更加和平、更加繁荣。

China's Tea Villages

    In most Chinese tea villages, March is the time of year in which locals start to pick and process tea. The____ (usual) quiet villages suddenly become busy centers of activity, as people take out special tools and prepare____tea processing. In some villages, local residents hold traditional ceremonies,____(thank) heaven for its blessing. The price of tea____(pick) in March is extremely high because____is fresh, tender and contains multiple trace elements.

    China____ (be) famous for tea production since ancient times. Of the goods transported and traded along ____ Old Silk Road linking China to the Middle East and Europe, the importance of tea was matched only by silk. China produces Oolong, black, green, white, yellow____ dark (post-fermented) tea. The Oolong, green and black____ (vary) are most notable for their high quality.

Most of China s tea villages are found in remote mountainous areas in the country's south and southwest,____the beautiful scenery is often hidden under clouds.