曹娟通过“问卷星”平台设计了一道有5个选项的排序题，结果发现一共有50位同学回答了该题，其中将A选项排在第一位的有15人，排在第二位的有20人，排在第三位的有8人，排在第四位的有7人，则选项A的平均综合得分为（ ）。

A . A.（2）（1）（3） B . B.（3）（2）（1） C . C.（3）（1）（2） D . D.（2）（3）（1）

A . 启动-规划-监控-执行-收尾 B . 启动-执行-监控-规划-收尾 C . 启动-规划-执行-监控-收尾 D . 启动-监控-规划-执行-收尾

A . 有限制的 B . 精确的 C . 精准的 D . 无限制的

A . ①⑤③②④⑥ B . ⑤②③①④⑥ C . ①⑤②③⑥④ D . ⑤③②①⑥④

A . A.1.25 B . B.12.5 C . C.125

A . 前测，了解学生的学情 B . 教学中及时了解学生的学习进度 C . 教学中根据学生反馈调整教学安排 D . 课后了解学生对于知识的掌握情况

A . （2）（1）（3） B . （3）（2）（1） C . （3）（1）（2） D . （2）（3）（1）

A . 满足穷尽性，满足互斥性 B . 不满足穷尽性，满足互斥性 C . 满足穷尽性，不满足互斥性 D . 不满足穷尽性，不满足互斥性

A . 在线设计问卷 B . 发布问卷并设置属性 C . 发送问卷 D . 查看调查结果 E . 创建自定义报表

A . abcd B . bacd C . dcba D . cabd

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

A．坚持科学发展观、以人为本 B．坚持立党为公、执政为民 C．把解决人民群众切身利益问题放在首位 D．代表中国最广大人民的根本利益 E．以全心全意为人民服务为根本宗旨

A．（2）（1）（3） B．（3）（2）（1） C．（3）（1）（2） D．（2）（3）（1）

A．甲公司应当选择候选成交供应商中排名第一的A公司为预成交供应商 B．甲公司认为A公司价格明显低于市场价格，很有可能影响合同履行，因此直接判定A公司价格核查不通过 C．在A公司价格核查不通过的情况下，甲公司确定候选成交供应商中排名第二的B公司为预成交供应商 D．甲公司发布预成交结果公示，公示结束后向B公司发出成交通知书

A．增强了驾驭经济社会发展大局和解决复杂问题能力 B．增强了公共政策执行力和发展活力 C．加深了对社会主义市场经济规律的认识 D．加深了对我国社会主义制度政治优势的认识 E．推动了社会主义文化道德水平的飞速发展

A．启动一规划一监控一执行一收尾 B．启动—执行— 监控一规划一收尾 C．启动一规划一执行一监控一收尾 D．启动一监控一规划一执行一收尾

题目：物体A在水平力F的作用下，静止在竖直墙壁上。当水平力减小为时<img src='https://img2.soutiyun.com/shangxueba/ask/18288001-18291000/18288201/2016030211102969144.jpg' />，物体A恰好沿竖直墙壁匀速下滑，此时物体A所受摩擦力的大小（）。 A.减小为原来的<img src='https://img2.soutiyun.com/shangxueba/ask/18288001-18291000/18288201/2016030211110027545.jpg' /> B.和原来一样 C.增大为原来的2倍 D.无法判断 问题： （1）指出正确选项，针对错误选项分析学生在物理知识方面可能存在的问题。 （2）针对其中一个错误选项，设计教学片段帮助学生掌握相关知识。

A、决议 B、决心 C、条例 D、法规

A．腾讯视频 B．优酷视频 C．爱奇艺 D．今日头条