阅读下面短文，回答相关问题：森林里生活着高大的乔木、低矮的灌木、草本植物。有许多鸟类在此栖息，有的鸟吃草子阅读下面短文，回答相关问题： 森林里生活着高大的乔木、低矮的灌木、草本植物。有许多鸟类在此栖息，有的鸟吃草子，有的鸟是杂食性鸟（）请写出最长的一条食物链：___________________，如果往绿色植物上喷洒农药，最后体内有毒物质积累最多的应该是________

A . 结尾，顺序 B . 开头，顺序 C . 结尾，倒叙 D . 开头，倒叙

A . 这三个提问是启发性提问的最典型代表 B . 这三个提问呈阶梯式出现，符合学生的思维规律 C . 这一整个启发性提问的设置不但使学生的提问得到了合理的解答，还能够使学生的思维得到一定的训练和拓展 D . 第三个提问在上两个提问的启发下，学生比较容易思考得出：愚人想逃避自己的影子的典故是为了说明"名是任何人都想要逃避的束缚"，也是为了引出欧阳修的态度

A . 对丰收在望的田园风光的热爱 B . 对献身家园的先烈的深切缅怀 C . 对和平富裕的生活的向往 D . 对辛勤劳作的农夫的赞颂

第一篇 Volunteers are being recruited(征募) to eat raw potatoes in the first human trials of a vaccine grown in genetically engineered vegetables. Researchers in Texas hope that people who eat the potatoes will be protected against common gut(肠，肠子) infections. They believe this technique could prove to be a cost-effective way of growing vaccines in developing countries where such diseases are still killers. Other researchers previously succeeded in using similar techniques to produce potential vaccines Now Hugh Mason and his colleagues at Texas A & M University(得克萨斯农业及机械大学) their plant vaccines on mice and plan to recruit 15 volunteers for a human trial. The team first tested the technique in tobacco plants. They took a strain of Escherichia coli(大肠杆菌) bacteria that causes food poisoning, and identified the part of the poison which binds to its victims gut cells. They then used a modified plant bacterium called Agrobacterium tumefasciens to transfer the segment of DNA which manufactures the binding protein into the tobacco plant. Under normal circumstances, these bacteria transfer packets of DNA into plant cells to force the plant to manufacture the nutrients they need. But in the modified bacteria, the DNA package includes the gene to pro- duce the binding protein. Once the foreign DNA segment was incorporated(结合，合并) into the tobacco's own DNA, the bacteria were killed off with antibiotics. Mason's team then grew these modified tobacco plants and found that they produced the E. coli binding protein. Proof of success came when the tobacco leaves were mashed up(捣碎) and squirted into the stomachs of mice. Mason says that within days the mice started producing specific antibodies to the E. coli poison, but suffered no ill effects from digesting the binding protein. Mason then produced genetically engineered potatoes and fed these to mice, with similar results. Mason's team have used plants to produce vaccines against a number of other infectious agents. For example, they have made a vaccine using a protein from the shell of the Norwalk virus, which causes diarrhoea(腹泻) in children. A third vaccine has also been produced in tobacco using a surface protein from the hepatitis B virus. But Mason says that so far they have only been able to produce small amounts of it in potatoes. Although a vaccine already exists against hepatitis B, a cheaper plant version could make mass immunisation(群众性免疫) possible. One problem with growing potatoes to produce vaccines is that cooking tends to destroy the protein component of the vaccine, so they must be eaten raw. Mason thinks that bananas may be a better option. "One banana could potentially produce a whole host of different vaccines," says Mason. The purpose of this text is______。 A. to prove that doctors don't like vegetables B. to amuse the reader by telling some funny things C. to describe how vegetables can grow vaccines for their own use D. to tell the reader about a cheaper way of growing vaccines

Ⅰ．中学课本中介绍了如下实验：把一端弯成螺旋状的铜丝放在酒精灯外焰加热，待铜丝表面变黑后立即把它插入盛有约2mL乙醇的试管里，反复操作几次。 Ⅱ．某课外活动小组利用下图装置进行乙醇的催化氧化实验并制取乙醛，图中铁架台等装置已略去．粗黑线表示乳胶管。<span><img src='https://img2.soutiyun.com/shangxueba/ask/18918001-18921000/18919711/2016071515511664145.jpg' /></span> 根据上述材料回答问题： （1）课本中实验制取乙醛存在哪些不足？ （2）11实验中，为了使反应进行的速率加快，需增加什么装置？ （3）教师在设计实验教学活动时，应如何培养学生的创新能力？