罐底的焊接顺序很重要，安排焊接顺序的原则是每条焊缝尽量可（）收缩，减少钢板和焊缝中的内应力。
A.自由
B.横向
C.纵向
D.约束
参考答案：A
从方框中选择正确的语句补全对话 使对话意思完整(6分)
A
A: What did you do last night?
B: I went to the concert.
A:小题1:
B: Yes. I had a good time. I enjoyed the music and songs very much.
A: 小题2:
B: They were very good.
A: When will there be the next concert?
B: Next Friday evening. Do you want to go?
A: Yes, I do.小题3:
B: 50 yuan.
A: It’s kind of expensive.
B: I agree.
红细胞升高见于（）。
A.甲状腺功能低下病人
B.新生儿
C.高原生活
D.吸烟者
E.肺气肿病人
