搜题请搜索小程序“爱下问搜题”
问题
判断题
由于滑动轴承的轴瓦内衬在工作中承受磨损，故要求其只要有高的硬度和耐磨性。( )
答案
参考答案：
错
补全对话，情景问答
给下列的问句选择对应的答句。
( ) 1. Where is your mouth?
( ) 2. Nice to meet you!
( ) 3. Happy Teachers' Day!
( ) 4. Good morning!
( ) 5. How are you?
( ) 6. What's your name?
A. Nice to meet you, too.
B. Here it is.
C. My name is Mike.
D. Very well, thanks.
E. Thank you.
F. Good morning!
查看答案
单项选择题
弱酸树脂比强酸树脂容易再生是因为前者比后者（）。
A、交换容量大
B、溶胀性高
C、对氢离子选择性强
查看答案
