【单选题】Design of all the new tools and implements is based on careful experiments with electronic instruments. First, a human “guinea pig” is tested using a regular tool. Measurements are taken of the amount...
A.
is able to design new tools
B.
measures the amount of energy used
C.
enable people to see the muscular movements
D.
visualizes electrical signals
【判断题】欧姆表表在每次换挡测量前都必须进行欧姆调0。
【单选题】用万用表欧姆挡测电阻,下列说法中错误的是()。 1测量前必须调零,而且每测一次电阻都要重新调零;2每次换挡后都必须重新调零;3待测电阻如果是连在某电路中,应该把它先与其它元件断开,再进行测量;4两个表笔与待测电阻接触良好才能测得较准,为此应当用两只手分别将两只表笔与电阻两端紧紧地握在一起。
【简答题】单向板肋梁楼盖中,板内应配置有哪几种钢筋?
【判断题】What Dr. Beaumont found out from Alexis's stomach was that the food in the stomach made the muscles contract and the juices pour out, causing the food itself to start up the changes which result in it...
【简答题】I need to be at the airport by6.00 o’clock.(翻译)
【单选题】The roots of the brachial plexus are found in the ( ) between the anterior and middle scalene muscles at the level of the cricoid cartilage (C6) in the neck.
【简答题】连词成句。 1. There, melons, are, nine (.) _____________________________________ 2. apple, for, How, much, one (?) _____________________________________
【判断题】欧姆表在每次换挡测量前都必须进行欧姆调零。