血栓闭塞性脉管炎的早期症状是()。
A.患吱休息痛
B.间歇性跛行
C.患肢营养障碍
D.足背动脉搏动消
E.肢端干性坏疽
参考答案:B
解析:[知识点] 血栓闭塞性脉管炎的临床表现
___________child as she is,she find in____ surprise that she knows a lot of English words.
A.A;the
B.the ;the
C./;/
D.A;/
汽轮机的主油泵有哪几种类型?