【多选题】S7-200PLC中用顺序控制设计法设计程序时,需要明确的三个基本要素是( )。
【判断题】设某人向靶子射击三次,用Ai表示“第i次射击击中靶子”(i=1,2,3),则表达式 表示事件“第2次击中靶子”.
【判断题】计入产品的成本范围越大,期间成本的范围就越小。
【单选题】A great firebroke out in that supermarket, after which, a lot of goods ________.
【单选题】With great efforts of the peace-loving people all over the world,Iraq____the war. [ ]
【单选题】All the candidates were ______ the street to be named after a great man ______ his great contributions to the city.
A.
in favor of; in need of
B.
in praise of; in favor of
C.
in praise of; in need of
D.
in favor of; in honor of
【单选题】S7-200PLC中,采用顺序控制法设计程序时,如S1.0原处于接通的状态,当转移条件成立后,使S2.0接通,那么S1.0的状态应是( )。
【单选题】坤村润滑油超过规定多少时间,应经检测合格后方可使用
【单选题】邮轮海上航行期间遇不可抗力决定行程变更的是( )。