C类接头受力(),通常采用()连接。
参考答案:较小;角焊缝
请补充完整金属活动性顺序表:K Ca Na _________ Al Zn Fe Sn Pb(H)Cu_________Ag Pt Au.某校的当堂作业是:用两种不同的方法,设计实验来验证铁的金属活动性比铜强.写出实验步骤及实验现象,请你帮助完成该题.
— We spent three hours waiting in the rain _____ your coming late again.
— I am sorry. [ ]
A. rather than
B. instead of
C. because of
D. less than