患者，男，43岁。因左下肢静脉曲张行大隐静脉高位结扎剥脱术。术后该患者的患肢应（  ）

基金产品的风险等级按照风险由低到高的顺序，至少划分为（  ）等级

60岁以上男性发生急性尿潴留的最常见病因是

用人单位自用工之日起即与劳动者建立劳动关系。（  ）

2021年5月6日，甲公司与乙公司签约，约定甲公司于6月1日付款，乙公司6月15日交付“连升”牌自动扶梯。合同签订后10日，乙公司销售他人的“连升”牌自动扶梯发生重大安全事故，市场监督管理局介入调查。合同签订后20日，基于甲、乙、丙公司三方合意，丙公司承担付款义务。丙公司6月1日未付款。对此，下列哪一表述是正确的（       ）。

监视居住最长不得超过（        ）。

下列对于技术分析理解有误的是（  ）。

Passage 1    It's one of our common beliefs that mice are afraid of cats. Scientists have long known that even if a mouse has never seen a cat before, it is still able to detect chemical signals released from it and run away in fear. This has always been thought to be something that is into a mouse's brain.    But now Wendy Ingram, a graduate student at the University of California, Berkeley, has challenged this common sense. She has found a way to "cure" mice of their inborn fear of cats by infecting them with a parasite, reported the science journal Nature.    The parasite, called Toxoplasma gondii, might sound unfamiliar to you, but the shocking fact is that up to one-third of people around the world are infected by it. This parasite can cause different diseases among humans, especially pregnant women-it is linked to blindness and the death of unborn babies.    However, the parasite's effects on mice are unique. Ingram and her team measured how mice reacted to a cat's urine (尿) before and after it was infected by the parasite. They noted that normal mice stayed far away from the urine while mice that were infected with the parasite walked freely around the test area.    But that's not all. The parasite was found to be more powerful than originally thought-even after researchers cured the mice of the infection. They no longer reacted with fear to a cat's smell, which could indicate that the infection has caused a permanent change in mice's brains.    Why does a parasite change a mouse's brain instead of making it sick like it does to humans? The answer lies in evolution. "It's exciting scary to know how a parasite can manipulate a mouse's brain this way," Ingram said. But she also finds it inspiring. "Typically if you have a bacterial infection, you go to a doctor and take antibiotics and the infection is cleared and you expect all the symptoms to also go away." She said, but this study has proven that wrong. "This may have huge implications for infectious disease medicine."
The experiment found that mice infected with toxoplasma gondii ______.

不属于弥漫性结缔组织病的是(    )。

商业银行不得用自有资金购买本行发行的理财产品，不得为理财产品投资的非标准化债权类资产或权益类资产提供任何直接或间接、显性或隐性的担保或回购承诺，不得用本行信贷资金为本行理财产品提供融资和担保。（  ）