拉形原理。
参考答案:
拉形时板料两端在拉形机夹钳夹紧的情况下,随着拉形模的上升,板材与拉形模接触产生不均匀的双向拉伸变形,是板料与拉形模逐渐贴合的成型方法。
A 5-month-old infant is brought to the clinic by his parents because he "cries too much" and "vomits a lot. " The infant’s birth weight was 6 pounds, 10 ounces, and his current weight is 7 pounds, 4 ounces, falling below the 5th percentile on a standard growth chart. Which of the following data would the nurse identify as the priority
A. Frequency of regular checkups.B. Feeding pattern.C. Pattern of weight gain.D. Family dynamics.
在双代号时标网络中,波形线表示工作与紧后工作的时间间隔。