操作风险是指（　）。

取前伸颌位关系记录是为了确定（    ）

患儿，男，6岁。腹痛绕脐，多食善饥，面黄肌瘦，大便曾排蛔虫。医师建议选用使君子。关于使君子的使用注意，表述正确的是（ ）

客户还款方式一旦确定，就不得变更。(    )

毛泽东建军思想是毛泽东思想和毛泽东军事思想的重要组成部分，它根植于中国共产党伟大的 建军实践，它的形成与发展充分显示了前所未有的独创性。这一思想的核心是（      ）

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 ______.

中午放学时，某学校校门口停满了接送学生的车辆。学生蜂拥而出。外卖派送员张某逆着人流骑电动车驶入校园，不小心将学生李某撞倒，腿部被擦伤。在这起事故中，应当依法承担相应法律责任的是（）。

按照《药品包装、标签规范细则（暂行）》，不属于说明书和标签上必须印有符合规定标志的药品是

青霉素最常见和最应警惕的不良反应是

企业间的商品赊销属于消费信用。（  ）

滑坡防治的工程措施主要有(    )、力学平衡以及改变滑带土三类。