急性乳腺炎()
A. * * 胀痛,严重者可并发脓毒血症
B. * * 出现血性溢液
C. * * 内陷
D.出现无痛、单发的小肿块
E. * * 出现棕褐色溢液
参考答案:A
Was it because of the heavy snowstorm in Europe the flight had to be put off?
A.which
B.so
C.why
D.that
桥式起重机轮压不均,特别是主动轮轮压太小时,会引起()。
A.小车“三条腿”运行
B.小车运行打滑
C.小车啃轨咬道
D.小车架变形