行邻面预备的目的是()A.为3/4冠预备出足够的邻面间隙 B.保证冠顺利就位 C.消 发布时间:2017-06-18 14:35 │ 来源:www.tikuol.com 题型:单项选择题 问题: 行邻面预备的目的是()A.为3/4冠预备出足够的邻面间隙B.保证冠顺利就位C.消除覆盖区的倒凹D.以上均不正确E.以上均正确
题型:单项选择题 对话填空 (满分10分)请认真阅读下列对话,并根据各题所给的首字母的提示,在答题卡右栏中标有题目的横线上,写出一个英语单词的完整、正确的形式,使对话通顺。A: Lucy, do you have any (76) p_______ for this weekend?B: Yes. I’ll go to the village to visit my grandpa. It’s his 77th(77) b_____.A: Congratulations! By the way, aren’t your grandparents living with you?B: After my grandma passed away 3 years ago, my grandpa decided to live (78) a____. We have invited him to live with us several times, but he (79) r____.A: Why? I think he would be nicely taken (80) c____ of if he lived with you.B: We all do. He said he couldn’t leave his old neighborhood (81) w_____ all of his old friends lived. (82) B_____, he didn’t want to lose his independence.A: It doesn’t matter if he is in good (83) h____, is he?B: No. he suffers from a disease that needs close attention.A: I’m sorry to hear that. But how can he live alone (84) u___ this condition?B: Luckily, with the help of a new technology, which uses placed home sensors to record motion in key spots, such as the bathroom and bedroom, he can live in his own space, and we don’t (85) w____ about him.A: How great it is!(76)_____(77)_____(78)_____(79)_____(80)_____ (81)_____(82)____ (83)____ (84)____ (85)___ 查看答案
题型:单项选择题 将人体的热能收集起来,然后转换成电能,也是一条经济实用的途径。美国匹兹堡大学设计了一个热量收集系统,该系统将学生和教师释放的热能,电灯、厨房以及从窗外射入的阳光等所产生的热量,统统聚集到一个中央设备中,再由地下的管道重新分散。据说,此系统在寒冷的冬季,完全可以供学校的10座大厦取暖之用。其实,这一系统完全可以具备双重用途,即在炎热的夏季里,还可以当做制冷设备使用,从而使大楼中的环境非常舒适。 这段文字的中心意思是( )。A.美国已经开发出了人体热能设备B.人体热能能够转换为电能C.热量收集系统具有双重功能可以使环境更加舒适D.人体热能的开发是一条经济实用的途径 查看答案