单选题梗死前心绞痛的哪一点与急性心肌梗死不同

单选题肾上腺糖皮质激素对血细胞的作用是

单选题1型糖尿病采用胰岛素合并口服降糖药物时，最好选用下列哪类药物

单选题下列不符合食管癌的描述是

单选题5岁男孩，近两年发育明显迟于同龄儿童，近1个月出现咳嗽，低热，经抗感染治疗后无明显好转，PPD试验(++)阳性，应考虑该儿童患有

单选题男性，32岁，臀部片状鳞屑样皮损7年，近1年出现远端指间关节不对称肿痛，指甲可见顶针样凹陷，最可能的诊断是

单选题炎症是

单选题对高血糖高渗性状态，下列提法错误的是

单选题安静状态下，呼吸膜的扩散面积约为

单选题肾病综合征预防性抗凝治疗的指征是

单选题 下列哪项不是急性心功能不全的表现之一? A、心源性昏厥 B、心源性休克 C、急性肺水肿 D、心脏骤停 E、夜间阵发性呼吸困难

单选题糖尿病酮症酸中毒的早期表现为

单选题男性，65岁，上腹不适伴反酸、烧心2年，要确诊胃食管反流病最主要的检查是

单选题氧解离曲线由正常位置向左移，可见于下列哪种情况

单选题结核性胸膜炎和浸润性肺结核均为

单选题男性，25岁，2天前不明原因出现干咳、胸闷，继之明显喘憋。给予静滴青霉素治疗无效。近3年来，患者常于秋季出现发作性咳嗽、气短。查体：端坐呼吸，呼吸急促，皮肤黏膜轻度发绀，双肺呼吸音减低，散在哮鸣音，心界不大，脉搏120次／分，无杂音，有奇脉。诊断应首先考虑为

单选题目前已知最强的胃酸分泌抑制剂是（ ）

单选题The unknown pervades the universe. That which people can see, with the aid of various sorts of telescope, accounts for just 4% of the total mass. The rest, however, must exist. Without it, galaxies would not survive and the universe would not be gently expanding, as witnessed by astronomers. What exactly constitutes this dark matter and dark energy remains mysterious, but physicists have recently uncovered some more clues, about the former, at least. One possible explanation for dark matter is a group of subatomic particles called neutrinos. Neutrinos are thought to be the most abundant particles in the universe. According to the Standard Model, the most successful description of particle physics to date, neutrinos come in three varieties, called "flavors". Again, according to the Standard Model, they are point-like, electrically neutral and massless. But in recent years, this view has been challenged, as physicists realized that neutrinos might have mass. The first strong evidence came in 1998, when researchers at an experiment, based in Japan, showed that muon neutrinos produced by cosmic rays hitting the upper atmosphere had gone missing by the time they should have reached an underground detector. Its operators suspect that the missing muon neutrinos had changed flavor, becoming electron neutrinos or-more likely-tau neutrinos. Theo- ry suggests that this process, called oscillation, can happen only if neutrinos have mass. Over the coming months and years, researchers hope to produce the most accurate measurements yet. The researchers created a beam of muon neutrinos first. On the other side of the target sat a particle detector that monitored the number of muon neutrinos leaving. The neutrinos then travelled 750km (450 miles) through the Earth to a detector in a former iron mine in Soudan, Minnesota. Researchers then were able to confirm that a significant number of muon neutrinos had disappeared-that is, they had changed flavor. While their mass is so small that neutrinos cannot be the sole constituent of dark matter, they have an advantage in that they are at least known to exist. The same cannot be said for sure of another possible form of dark matter being studied by a group of physicists in Italy. If the result continues to withstand scrutiny, it would appear to be evidence for an exotic new sort of fundamental particle, known as an axion, which could also be a type of dark matter.

单选题内基小体是

单选题 剖腹术后1周，伤口内有多量淡红液体流出，应考虑 A、切口感染 B、切口裂开 C、切口皮下积液 D、切口内有血肿 E、病人有出血素质