重症胰腺炎化验检查可出现()
A.CA199显著升高
B.血浆VIP(血管活性肠肽)水平升高
C.CT可见胰腺占位性改变
D.抗中性粒细胞胞质抗体阳性
E.低钙血症
参考答案:E
He used to live here, but now he lives here.
A. no longer
B. doesn't longer
C. not
D. any longer
清理过滤器时,若过滤器内介质是油,则应事先用()进行置换。
A.蒸汽
B.冷水
C.热水
D.汽油