题目内容
下列关于梁式桥说法不正确的是( )。
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简支梁桥是静定结构,机构内力不受基础变位的影响,因而能适用于地基较差的桥位上建桥。( )
斜拉桥和悬索桥这两种桥型由于充分利用了钢材的抗拉性能和混凝土材料的抗压性能而使其结构形式非常合理,因此更适用于大跨径的桥梁。
1.__________ the number in full-time employment fell by 2 million, the number ofpeople in part-time work doubled to over 4million. (2014-12)a. unless b. until c. while d. since2.__________salaries may not be high, working as a nursing assistant does have some other benefits. (2015-12)a. unless b. while c. as d. since3. While(live)______ in the UK, a driving license issued in your country only remains valid for up to 12 months.(2014-06)4. You need to consider either a paid or volunteer bridge job while____ full-time work. (2016-12)a. to seek b. soughtc.seekd. seeking5. The decision about such a big project cannot be made ________each member of the board agrees.a.if b. unless c. though d. as6. _____ the sales team can work out a new promotion plan, it will be hard for the company to get through the crisis. (2015-06)A) While B) As C) Until D) Unless7. Companies understandably ask: why should I train you _________ you’ll leave and work for my competitors? (2018-12)A. if B. unless C. until D. although
在运算放大器的同相放大电路中，输出通过负反馈的作用，使反相输入端自动跟踪同相输入端，这种现象称为
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