皮皮学，免费搜题
登录
搜题
【单选题】
一般模具型腔表面粗糙度值要比塑件表面的低( )A.
1-2个等级
B.
2-3个等级
C.
3-4个等级
D.
4-5个等级
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】烷基化反应中常用的烷化剂和烷基化方法有哪些？
【简答题】People in different countries have different ways of doing things. Something that is 1 in one country may be quite impolite in another. In Britain , you mustn't lift your bowl to your 2 when you are h...
【简答题】Perhaps those who have been rendered unhappy by a bad theory may need a better theory to help them to recovery,just as you may need a tonic when you have been ill.
【判断题】When you have a bad cold, you'd better do a lot of sports and eat junk food.
A.
正确
B.
错误
相关题目：