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【判断题】
PLC 的输入输出端口都采用光电隔离A.
正确
B.
错误
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】现已定义两个数组 int a[4] ; int b[4]={2,4,6,8}; 下列赋值语句使用正确的是( )。
A.
a={1,3,5,7};
B.
a=b;
C.
for(i=0;i<4;i++) scanf(“%d”,a[i]);
D.
a[0]=b[0];a[1]=b[1];
【单选题】When I arrived at his office,he ___ on the phone.
A.
was speaking
B.
spoke
C.
had been speaking
D.
had spoken
【单选题】When I got to the ticket box, all the tickets for 7 o'clock film________________.
A.
sold out
B.
were sold out
C.
have sold out
D.
have been sold out
【单选题】下列选项中不属于控制性详细规划编制内容的是（ ）
A.
制定相应的土地使用与建筑管理规定
B.
提出各地块的建筑体量、体型、色彩等城市设计指导原则
C.
根据交通需求分析，确定地块出入口位置、停车泊位、公共交通场站用地范围和站点位置、步行交通以及其他交通设施
D.
现状调研与前期研究
【简答题】请选出下列英文短语或句子的正确中文匹配。A. How would you like your steak cooked?B. particular preferenceC. today`s specialD. invite you outE. skim/whole milk
【简答题】In the figure,the current of current source I S = (A)?
【单选题】When I wanted a quiet night, I ____ my telephone and slept as long as I wanted.
A.
turned up
B.
turned down
C.
turned off
D.
turned on
【简答题】Given the circuit as shown in the figure,(1) when I =4A,the current of current source I S =______A ;(2) when U =9V,the current of current source I S =______A:
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