上颌窦后外壁的恶性肿瘤引起的张口困难的原因是() ["肿瘤侵犯了颞颌关节","肿瘤侵犯了翼内肌","肿瘤侵犯了翼外肌","肿瘤侵犯了咬肌","肿瘤侵犯了下颌关节"]
全髋置换的主要指征是() ["疼痛,功能未丧失","关节活动性感染","尽管进行了保守治疗,关节活动与活动力进行性减弱","神经病性关节","臀部与转子区疼痛"]
淋证的病位在() ["膀胱和肾","膀胱","肾","肝","脾"]
下列哪项不是淋证的主症() ["小便频数","小便淋沥不尽","小便量少或点滴不出","少腹拘急","痛引腰腹"]
体内最重要的抗凝物质是() ["蛋白C系统","抗凝血酶(AT)","组织因子途径抑制物(TFPI)","肝素"]
房地产企业直接向塑钢窗厂订购塑钢窗并由塑钢窗厂负责安装,用于商品房建造,取得了增值税发票;与施工单位签订的商品房施工合同不含门窗;此时房地产公司是否还要按塑钢窗采购安装总价补缴一道营业税?