1.  >>  国家开放大学 / 土木工程力学(本)
 国家开放大学 / 土木工程力学(本)

图示结构影响线的 AC 段纵标为零 。





 参考答案:
 佳题速递:
  • “沉舟侧畔千帆过,病树前头万木春。”“芳林新叶催陈叶,流水前波让后波。”这两句诗包含的哲学道理是()    马克思主义基本原理
  • 20[单选题] 下列关于语义场的表述,不正确的一项是 A.不同语义场的系统性是均衡的 B.语义场与上下位词关系密切 C.语义场是词义系统性的重要表现 D.语义场是一个层级体系语言学概论
  • 题干二、阅读理解:阅读下面的短文,根据文章内容进行判断,正确为“T”,错误为“F”。 Millions of people around the world cook their food over a smoky fire every day. It is often difficult to find wood for the fire. People who do not have wood must spend large amounts of money on cooking fuel. However, there is a much easier way to cook food using energy from the sun. Solar cookers, or ovens, have been used for centuries.   Solar ovens consist of a system of reflectors and a cooking pot. The rest is up to your imagination! Once you have collected or bought your solar oven, you can use it to prepare hot meals in the backyard, at a campground or wherever your heart desires. Of all the inventions that could benefit humankind, a reliable solar cooker remains one of the most necessary. Countless people across the developing world still cook their food by burning wood or even cow dung, causing breathing problems and severe pollution in some regions. The searching for a practical solar cooker has gone on for decades and produced dozens of models. But none of them have caught on importantly for use in the developing world because they can’t store heat. Without the ability to store heat, a cooker cannot be used, for example, on cloudy days. But now a group based at the Norwegian University of Science and Technology (NTNU) is reporting a discovery in solar cookers. They say it will lead to the production of practical solar cookers within a year and a half and it can store enough heat during a sunny day to work for an entire additional day, even if it is cloudy.   People who do not have wood must spend small amounts of money on cooking fuel.回答TF正确获得1.00分中的1.00分 There is a much easier way to cook food using energy from the sun.回答TF正确获得1.00分中的1.00分 Solar cookers, or ovens, have not been used for centuries.回答TF正确获得1.00分中的1.00分 Solar ovens consist of a system of reflectors and a cooking pot.回答TF正确获得1.00分中的1.00分 Without the ability to store heat, a cooker can be used, for example, on cloudy days.回答TF正确获得1.00分中的1.00分理工英语1
  • 绿脓杆菌性角膜溃疡的潜伏期眼科学
  • 推销人员的穿着应该根据不同的场合、不同的推销对象而有所变化。现代推销技术
  • 第一次全国文代会的召开时间是:中国当代文学