13型车钩施焊部位多层焊时采用分层纵向进行,焊波宽应为焊条直径的(),每焊完一层应清除熔渣后方可进行下一层焊接。
A.1~2倍
B.1~3倍
C.2~3倍
参考答案:C
急性中毒性精神障碍最重要的一个临床症状是
A.兴奋失眠
B.错觉
C.烦躁不安
D.不同程度意识障碍
E.行为异常
23. ---________the new housemaid cook some supper for you, Tom?
---No, tell her I’ll eat outside tonight.
A.Shall
B.Would
C.Will
D.Could