弯曲试验能检验出钢焊缝承受变形的能力，还能反映出焊缝（）
A.内部缺陷
B.外部缺陷
C.伸长能力
参考答案：A
词语运用。
1. December is the t _____ of the year.
2. Rachel runs fast. She always _____ (beat) me.
3. Don't play in the street. That's too _____ (danger).
4. I'll go to Shanghai _____ (而不) Beijing.
5. He couldn't _____ (想出) an appropriate answer just at the time.
人口迁移的空间取向。
