皮皮学，免费搜题
登录
搜题
【判断题】
传统的继电接触控制系统是由许多硬件继电器、接触器组成的，而 PLC 则是由许多“软继电器”组成。A.
正确
B.
错误
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】、 设有如下程序段: int i=0 , sum=1 ; do { sum+=i ; i++ ; } while ( i<6 ); printf ( "%d\n" , sum ); 上述程序段的输出结果是( )。
A.
11
B.
16
C.
22
D.
15
【单选题】—I have a nice book. —Oh, can you ________?
A.
give me to it
B.
give me it
C.
give it to me
【简答题】According to a recent survey released earlier this month, 8 percent of drivers, or 1.2 million people, are using handheld or hands-free cell phones at any given time during daylight hours. That's doub...
【简答题】When you are in need of further quantities, please ________ free to communicate with us.
【简答题】When you are ______ need of further quantities, please feel free to communicate ______ us.
【简答题】Are you looking for something fun and would you like to help others in your free time? Then join us to be a volunteer! We’re a non-profit organization. We have volunteer jobs of all ages. Anyone, from...
【单选题】用pH试纸测定食用白醋的酸碱度，如果先将pH试纸用蒸馏水润湿后，再把白醋滴在试纸上，测得的pH与白醋实际pH比较（ ）
A.
前者偏高
B.
前者偏低
C.
两者相等
D.
难于确定何高何低
相关题目：
参考解析：
知识点：
题目纠错 0
发布
