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People often fall ill because of me.36 , they can hardly blame me; it is largely their own37 . A tired person may get38 , especially when he goes to crowded places with polluted air. A sudden change in 39is another factor. In hot summer, people turn on the air-conditioner upon returning home. They will catch a cold easily.

People often fall ill because of me.36 , they can hardly blame me; it is largely their own37 . A tired person may get38 , especially when he goes to crowded places with polluted air. A sudden change in 39is another factor. In hot summer, people turn on the air-conditioner upon returning home. They will catch a cold easily.
题目：People often fall ill because of me.36 , they can hardly blame me; it is largely their own37 . A tired person may get38 , especially when he goes to crowded places with polluted……继续阅读 »

根据本文提供的信息，下列推断不合理的一项是

根据本文提供的信息，下列推断不合理的一项是
题目：根据本文提供的信息，下列推断不合理的一项是 A．以居民健康为基础的社会发展战略，要求从个人层面来考虑国家医疗卫生体系的发展方向。 B．建设“健康国家”是一个系统工程，是逐层递进、不断完善的发展过程，不会一蹴而就。 C．推行基于居民健康的社会发展战略，有利于提高全社会的健康意识，合理利用社会资源。 D．我们必须根据国情，从实际出发，实施具有中国特色的“健……继续阅读 »

有关神经系统的叙述，错误的是

有关神经系统的叙述，错误的是
题目：有关神经系统的叙述，错误的是 A.脊髓、脑干属于中枢神经系统 B.位于大脑皮层的呼吸中枢是维持生命的必要中枢 C.神经系统调节机体活动的基本方式是反射 D.高级神经中枢和低级神经中枢对躯体运动都有调节作用 喵查答案：B ……继续阅读 »

E

E
题目：E The need to feed a growing population is putting much pressure on the world’s supply of water. With 97% of the world’s water too salty to be drunk or used in agriculture, the ……继续阅读 »

下列有关实验操作的说法正确的是

下列有关实验操作的说法正确的是
题目：下列有关实验操作的说法正确的是 A. 可用25ml碱式滴定管量取20.00ml KmnO4 溶液 B. 用pH试纸测定溶液的pH时，需先用蒸馏水润湿试纸 C. 蒸馏时蒸馏烧瓶中液体的体积不能超过容积的2/3，液体也不能蒸干 D. 将金属钠在研体中研成粉末，使钠与水反应的实验更安全 喵查答案：C 【解析】A项中的KMnO4溶液有很强的氧化性，会腐蚀橡皮管……继续阅读 »