【判断题】零件图样中能够准确地表达物体的尺寸与形状的图形称为图样。
【多选题】该电路图中,关于时间继电器KTI说法正确的是
C.
在摇臂升降停止时,时间继电器KT1起到延时接通液压泵电动机,夹紧摇臂的作用。
D.
在摇臂升降停止时,时间继电器KT1起到延时接通液压泵电动机,松开摇臂的作用。
【单选题】零件图样中,能够准确地表达物体的尺寸与()的图形称为图样。
【单选题】零件图样中,能够准确地表达物体的()的图形称为图样。
【简答题】Mr. Reed made up his mind to devote all he had to some schools for poor children. [ ] A. set up B . setting up C. have set up D. has set up
【单选题】Mr Reed made up his mind to devote all he had to _____ some school for poor children. A. set up B. setting up C. have set up D. having set up
【判断题】栲胶除用于制革之外,还用于制胶粘剂、稀释剂、脱硫等。
【单选题】Mr. Reed made up his mind to devote all he had to some schools for poor children.