压力焊
参考答案:
利用焊接时施加一定压力而完成焊接的方法。
She often shares her deepest thoughts and fears with friends through QQ, as if they______ chatting in her living room.
A.were
B.are
C.had been
D.has been
下列表现的疾病为:男孩,6岁,低热3天,两下肢及臀部有出血性皮疹,伴腹痛,便血1次,两踝关节肿痛,1周前曾患上呼吸道感染。()
A.风湿性关节炎
B.化脓性关节炎
C.川崎病
D.结核性关节炎
E.紫癜性关节炎