皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【单选题】
听力原文:M: Hello everyone. Thank you for listening. Today's topic is organic farming and organic food, and we have invited Dr. Scott to our program who is a scientist from Washington State University. W: Hello, everyone, I'm Mary Scott. I'd like to talk about the organic farming and food that our university studies. M: What is the latest news of the study? W: Well, we have found organic farming is not only good for the environment, it can also increase profits for the farmers. The trees grown organically can produce better tasting fruits. M: Wow, that's very encouraging. W: Yes. People who have tasted organic apples say they are much sweeter than any other apples produced non-organically. M: Haha. It must be very interesting to taste the different apples. W: Yes. Now more and more people believe eating organic food is more helpful than eating food produced with chemicals. M: Sure. I am willing to pay more for organic food products. W: Yes, it's believed to be healthier. Organic farmers do not use chemicals to increase their crops or to control insects, weeds and disease. M: Well, what are the prospects for the organic food? W: It's one of the fastest growing areas of American agriculture. The number of organic farmer is growing at a rate of about 12% each year. M: Thank you for the information. This is Bill Wright with Dr. Scott. W: Thank you. (23)
A.
It's about the change of people's taste.
B.
It's about the organic food and organic farming.
C.
It's about the development of agriculture.
D.
It's about the healthy problem.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】选择公差等级的基本原则是在满足使用要求的前提下,尽量选用精度(   )的公差等级。
A.
B.
C.
任意
【简答题】如图,将△ ABC 沿射线 BC 方向平移得到△ DEF ,边 DE 与 AC 相交于点 G ,如果 BC = 3cm,△ ABC 的面积等于9cm 2 ,△ GEC 的面积等于4cm 2 ,那么 BE = cm.
【判断题】选择公差等级的基本原则是在满足使用要求的前提下,尽量选取精度高的公差等级。
A.
正确
B.
错误
【简答题】如图,将等边△ABC沿BC方向平移得到△A 1 B 1 C 1 .若BC=3, ,则BB 1 = .
【简答题】如图(1),在△ABC中,AE=EB,AF=FC,则EF与BC存在以下关系:EF∥ BC,将AC沿BC方向平移到DH,得图(2),沿CB方向平移到DH得图(3),图(2)中AD与BH存在关系:EF∥AD, ,那么在图(3)中是否有类似于图(1)(2)中的结论,请把猜想的结论填在方框内,并就图(3)的结论加以证明。
【简答题】如图,△ABC沿BC方向平移至△DCE,其中 , ,则 (    ), (    )
【简答题】东方植物学的起源著作是( )。
【判断题】接待是汽车维修服务流程的第一个重要环节,它提供了立即与顾客建立良好关系的机会。()
A.
正确
B.
错误
【简答题】如图,在△ABC中,将△ABC沿x轴正方向平移2个单位长度,再沿y轴沿负方向平移1个单位长度得到△EFG。 (1)画出△EFG,并写出△EFG的三个顶点坐标; (2)求△EFG的面积。
【单选题】温度对酶活力的影响错误的是()
A.
在低温条件保存酶制剂一般不会使酶破坏
B.
在一定范围内升高温度可加快反应速度
C.
温度过高会加速酶蛋白变性
D.
有的酶可耐受近100℃的高温
E.
酶制剂最好在其最适温度条件下保存
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题