简述焊接应力产生的原因。

A 13-year-old visits the school nurse because he’s experiencing back pain, fatigue, and dyspne

a. The nurse suspects that the child may have scoliosis. The nurse should firstA. send the child home to recover.B. inspect the child for uneven shoulder height or uneven hip height.C. arrange for the child to have spinal X-rays as soon as possible.D. ask the child’s parent to take him to a physician immediately.

第四部分：写作（共三节，满分35分）

第一节完成句子（共5小题；每小题1分，满分5分）

小题1: __________                            （到现在为止）, we have achieved what we would never expect to achieve.

小题2:                                   （这很有可能） that he would succeed in his career.

小题3: A lot of new states in America  ________                     （模仿了） the English fashion at that time.

小题4: You can’t ___________ _____________ _______________（得出结论） without enough evidence.

小题5:There must be a major  _____________（误会） , for I can’t understand her at all.

女，31岁，反复心悸、气短9年，2天来不能平卧，心悸、气短加重，查体：端坐呼吸，颈静脉怒张，心界扩大，心率：126次/分，律绝对不齐，心音强弱不等，心尖区可闻及隆隆样舒张期杂音和3级收缩期杂音，胸骨左缘3～4肋间有舒张期叹气样杂音，主动脉瓣区可闻及3级收缩期杂音，双肺有较多湿啰音，肝右肋下2～3cm，肝颈静脉回流征阳性，下肢凹陷性水肿。问：该病例应考虑有哪些诊断?可以做哪些检查?应进行哪些治疗?

关于大叶性肺炎的描述不正确的是（）。

A.炎症消退后肺泡壁可恢复正常结构

B.多由肺炎链球菌引起

C.醉酒可为肺炎的诱因

D.增生性炎症

E.多见于青壮年

RRU是否支持级联？级联的注意事项是什么？