皮皮学，免费搜题
登录
搜题
【单选题】
关于空压机进、排气环状阀的叙述错误的是( )。A.
对阀座密封面和阀片的平面度、相互贴合的密切程度的要求不高。
B.
阀盖结构与阀座相似，其通道和阀座是错开的。主要作用是控制阀片升起的高度。
C.
每组阀上的阀片数根据气流速度和排气量来定，一般为 1 ～ 5 片，有的可达 8 ～ 10 片。
D.
通过弹簧作用于阀片上的预紧力，使阀片与阀座密封，并减缓阀片在启闭时的冲击力。
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
【简答题】A friend of mine is a department manager at a large company. His secretary requested a 10% salary raise. The problem was that 10% was a large raise compared to the 5% other employees had received. Was...
【简答题】A friend of mine is a department manager at a large company. His secretary requested a 10 % salary raise. The problem was that 10 % was a large raise compared to the 5% other employees had received. W...
【单选题】使用万用表时要注意以下哪项（）
A.
使用前要机械回零
B.
测量电阻时，转换档位后水必进行欧姆回零
C.
测量完毕，转换开关置于最大电流档
D.
测电流时，最好使指针处于标尺中间位置
【简答题】A friend of mine is a department manager at a large company. His secretary requested a 10% salary raise. The problem was that 10% was a large raise compared to the 5% other employees had received. Was...
【单选题】79. 使用万用表时要注意( )。
A.
使用前要机械调零
B.
测量电阻时，转换挡位后不必进行欧姆调零
C.
测量完毕，转换开关置于最大电流挡
D.
测电流时，最好使指针处于标尺中间位置
【简答题】A friend of mine is a department manager at a large company. His secretary requested a 10% salary raise. The problem was that 10% was a large raise compared to 5% other employees had received. Was the...
【简答题】使用万用表时要注意哪些问题？
【简答题】(2017.06) 30.The traffic was so much noise that I couldn’t hear what he __________ .A. is sayingB. wassayingC. hassaidD. will say
【单选题】级A2017.6 30.The traffic was making so much noise that I couldn’t hear what he____________.
A.
is saying
B.
was saying
C.
has said
D.
will say
相关题目：
【单选题】79. 使用万用表时要注意( )。
A.
使用前要机械调零
B.
测量电阻时，转换挡位后不必进行欧姆调零
C.
测量完毕，转换开关置于最大电流挡
D.
测电流时，最好使指针处于标尺中间位置
参考解析：
知识点：
题目纠错 0
发布
