【单选题】平面构架由AB、BC、CD三杆用铰链B和C连接,其他支承及载荷如图所示。力F作用在CD杆的中点E。已知F=8kN,q=4kN/m,a=1m,各杆自重不计。则固定端A处的约束力偶M大小【图片】
【单选题】对声音波形采样时,采样频率越高,声音文件的数据量______。
【简答题】资产负债表的格式有____________和____________两种,不管采用哪种格式,资产都按____________大小进行列示。
【简答题】10·连杆由______、_______和_______三部分组成。连杆_______与活塞销相连。
【简答题】听力原文:M: Well, I thought it was a bit strange at the time, but I just took down what I thought I heard on the machine, and then made out the order form. accordingly. It wasn't till they called back to ...
【单选题】—Lucy, I passed the English exam. It is not so difficult as I thought. —______________. [ ]
【简答题】听力原文:F: Well, I got there and I thought I was really well prepared for this. I was wearing my be a suit. I arrived on time and so did the other three applicants. But they kept us waiting for an hour a...
【简答题】压力表示方法有()和()两种,真空度属于()