阿托品的药理作用是()。

垄断企业的边际收入曲线总是（　　）。

甲公司购入乙上市公司股票并划分为交易性金融资产，共支付价款 3 600 000 元（其中包含已宣告但尚未发放的现金股利 100 000 元），另支付相关交易费用 10 000 元，取得并经税务机关认证的增值税专用发票上注明的增值税税额为 600 元。不考虑其他因素，甲公司取得乙公司股票时应借记“交易性金融资产”科目的金额为（ ）元。（ 2019 年）

为非离子型表面活性剂，是目前使用最普遍的一种外用杀精子药。临床上可用于短期避孕的是（    ）

《中国药典》规定，低温干燥的温度一般不超过（ ）

气瘿所属的中医证型为

施工作业进度计划编制的根据是(   )。

对于葡萄胎的诊断价值最大的是(   )

在Word中，需完成如下图所示“插入表格”功能，下列选项中，表述正确的是（      ）

明朝规定一切死罪案件必须上报中央司法机构（        ）。

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 passage is mainly about ______.