单选题子宫颈癌累及膀胱导致尿液经阴道排出，称为
单选题诊断子宫平滑肌肉瘤的主要依据是
单选题原核基因表达调控中的诱导现象是指
单选题下列物质中升血压作用最强的是
单选题逆转录的方向是
单选题对蛋白激酶A的叙述不正确的是
单选题左心的附壁血栓脱落后可导致
单选题心包积液时搏出量减少的原因主要是
单选题非霍奇金淋巴瘤工作分类中，高度恶性的是
单选题
肾病综合症时，导致组织水肿的原因是
A、 毛细血管血压升高
B、 血浆胶体渗透压降低
C、 组织液胶体渗透压增高
D、 淋巴回流受阻
E、 毛细血管壁通透性增加
单选题When a disease of epidemic proportions threatens the public, scientists immediately get to work, trying to locate the source of affliction and find ways to combat. Vaccination is one of the effective ways to protect the (1) population of a region or country which may be (2) grave risk. The process of vaccination allows the patient's body to (3) immunity to the virus or disease so that, if it is encountered, one can fight it (4) naturally. To accomplish this, a small weak or dead (5) of the disease is actually injected into the patient in a controlled environment, (6) his body's immune system can learn to fight the invader (7) . Information (8) how to penetrate the disease's defenses is (9) to all elements of the patient's immune system in a process that occurs naturally, in which genetic information is passed from cell to cell. This makes sure that (10) the patient later come into contact with the real problem, his body is well equipped and trained to (11) with it, having already done so before. There are, however, dangers (12) in the process. (13) , even the weakened version of the disease contained in the vaccine proves (14) much for the body to handle, resulting in the immune system (15) , and, therefore, the patient's death. Such is the case of the smallpox vaccine, (16) to eradicate the smallpox epidemic that nearly (17) the whole Native American population and killed massive numbers of settlers. (18) 1 in 10,000 people who receive the vaccine (19) the smallpox disease from the vaccine itself and dies from it. Consequently, the process, which is truly a (20) , may indeed hide some hidden curses.
单选题
卵巢单纯性囊肿是：（ ）
A、真性肿瘤
B、错构瘤
C、子宫内膜异位
D、慢性炎症病变
E、囊性瘤样病变
单选题下列不符合皮肤基底细胞癌的描述是
单选题A．胸椎内鳞状细胞癌B．乳腺导管内癌C．胃溃疡癌变累及深肌层D．卵巢交界性浆液性囊腺瘤
单选题构成最简单的启动子的常见功能组件是
单选题对于大脑皮层功能一侧优势的描述，恰当的是
单选题烧瓶状溃疡常见于
单选题关于肝脂肪变性的描述，正确的是
单选题交界性肿瘤是指
单选题下列不符合肝硬化腹水的描述是