在测量直流信号时,要使万用表的黑表笔接被测部分的正极,红表笔接被测部分的负极。()
参考答案:错
以下疾病可出现同形反应的是()
A.大疱性类天疱疮
B.过敏性紫癜
C.结节性红斑
D.白塞病
In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.
A. direct B. navigateC. indicateD. go-on
A Web browser is simply a terminal emulator, designed to display text on a screen. The two essential differences between an ordinary terminal emulator and a Web browser are that the browser knows how to deal with (71) , and that it has a mechanism for (72) graphical files. Display text, display graphics, and (73) hyperlinks ——there’s 99 percent of the (74) value. That’s not to say that the manufacturers didn’t go all - out to attach a hyperactive efflorescence of useless capabilities onto their browsers. Remember when media channels in the browser were a big deal, instead of the clutter you can’t wait to delete from your favorites of bookmarks menu Remember when client -side Java applets were supposed to become the preferred (75) , for application development Remember frames and all their nasty side effects