不可能宏达公司和亚鹏公司都没有中标。以下哪项最为准确地表达了上述断定的意思？（）

作为我国科举制度的一项重要改革，“弥封”、“誊录”制度确立于（　　）。

在上课时老师要求学生把身体作为乐器，把听到的音乐再现出来，通过身体动作，体验音乐节奏的速度、力度、时值变化来学习《辽阔的草原》，并在原地做动作，拍手、指挥、摇摆、弯腰、说话、歌唱等。以上做法运用了()教学方法。

下列关于公共建筑最小疏散净宽度设置符合存在问题的是（   ）。

分期围堰导流法包括束窄河床导流和（      ）。

急性肾炎使用青霉素的目的是(     )

毛泽东首次提出“马克思主义中国化”命题是在（   ）

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 ______.

甲状腺功能亢进时，腹泻的主要发生机制是(    )

采用满堂支架进行简支梁混凝土浇筑，合理的浇筑顺序是（）。

某人的红细胞与B型血的血清不凝集，其血清与B型血的红细胞也不凝集，此人血型为