皮皮学，免费搜题
登录
搜题
【单选题】
同样直径的奥氏体不锈钢焊条焊接电流值应比低碳钢焊条降低（）左右。A.
5%
B.
10%
C.
20%
D.
40%
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】It was a pity that when we got to the cinema, the movie___ , so we saw only the end of it.
A.
was finishing
B.
has just finished
C.
just finished
D.
had just finished
【单选题】What a pity! When we got to the cinema, the movie Let the Bullets Fly _________, so we saw only the end of it.
A.
was finishing
B.
has just finished
C.
just finished
D.
had just finished
【单选题】对于色谱峰相距太近或操作条件不易控制、准确测量保留值有一定困难的复杂样品,宜选择以下( )方法定性。
A.
用化学分析法配合
B.
利用文献保留值数据对照
C.
加入已知物增加峰高的办法
D.
利用求相对保留值
相关题目：
参考解析：
知识点：
题目纠错 0
发布
