①在观察洋葱鳞片叶内表皮细胞的DNA和RNA分布时，盐酸的作用是对该细胞进行解离

②经健那绿（Janus green B）染液处理的口腔上皮细胞中的线粒体依然保持生活状态

③用于观察质壁分离与复原的紫色洋葱表皮细胞同样可用来观察植物细胞有丝分裂

④探索淀粉酶对淀粉和蔗糖作用的专一性时，可用碘液替代斐林试剂进行鉴定

⑧孟德尔的豌豆杂交试验中将母本去雄的目的是防止自花授粉

⑥斯他林和贝利斯首次发现了动物激素﹣﹣促胰液素．

    A new word is becoming more and more popular on the Internet in China - but no one knows quite what it means. The word "duang" is so new that you can't even find it in the Chinese dictionary. But it has already spread(传播) like fire on the Chinese Internet, appearing more than 8,000,000 times on Weibo, where 15,000 users had more than 312,000 discussions. On Baidu, it has been looked up almost 600,000 times. But what does it mean?

    "Everyone's duang-ing and I still don't know what it means! Looks like I'd better go back to school now," said Weibo user Fahmida.

    Another user asked: "Have you duang-ed today? My mind is full of duang duang duang."

    "To duang or not to duang, that is the question," wrote user Beatrice.

    "Duang" seems to be imitating (模仿) a sound. It all seems to have started with Hong Kong action star Jackie Chan, who in 2004 appeared in a shampoo ad (洗发水广告) where he used the sound "duang" to describe his soft and black hair. The word came to people again recently(最近) after Chan posted it on his Weibo page. Thousands of users then began to visit Chan's Weibo page with comments (评论).

    The word seems to have many different meanings, and there's no perfect (完美的) Chinese meaning for it, but you could use it to give emphasis (强调) to the word that follows it. A kid might be "duang cute", for example.

    “Body clocks” are biological methods of controlling body activities. Every living thing has one. In humans, a body clock controls normal periods of sleeping and waking. It controls the times when you are most likely to feel pain. Eating, sleeping and exercising at about the same time each day will help keep body activities normal. But changes in your life—a new job, for example—destroy the balance and thus cause health problems. You could have difficult sleeping, for example. Scientists suggest that early afternoon is the best time of day for physical exercise. They say we are stronger and faster then. Later, about four o'clock, most people feel tired because of the drop of sugar level in the blood. Early afternoon also is a good time to do tasks about memory（记忆） and mathematics. If you must study, however, do it just before going to sleep at night. Scientists say you are more likely to remember information when there is a short delay（耽搁）between study and bed. Body clocks control all the activities from day to day. They also produce changes about every ninety minutes during the day. At the end of such a time period, our ability to think hard begins to become weak. That is the time we are most likely to day-dream. Within fifteen minutes, we are ready to go back to what we were doing.

人民网2008年2月5日报道，苏南地区2007年有望整体达到省定全面小康标准。这个省定小康标准共分四大类18项25个具体指标。分别是经济发展、生活水平、社会发展、生态环境。每个大类又有若干指标。核心的指标是三个：人均地区生产总值≥24 000元，城镇居民人均可支配收入≥16 000元，农村居民人均纯收入≥8 000元。这个指标体系，偏重的是“均量指标”。“以前我们说得较多的是总量指标。”

从上述数据看出，全面小康   (      )

①实现起来并不难                                                                          ②是物质文明、精神文明、政治文明和生态文明协调发展的社会 

③让人民过上幸福美好的生活是全面小康的重要目标              ④只要经济发展了，全面小康就能实现