【单选题】焊接结构的疲劳强度的大小与( )关系不大。
【单选题】I knew her ______ but I have never actually spoken to her.
【单选题】焊接结构的疲劳强度的大小与( )关系不大。
【单选题】Tom:Have you ever performed in front of anaudience? Jerry: Yes, I have. Actually, I __ it allthe time.
【简答题】489÷6商的最高位是______位,489÷3商是______.
【多选题】下列牌号的铸铁中,( )为灰铸铁。(基础知识)