| When we can see well, we don’t think
about our eyes very’ often. It is only when we cannot see perfectly that we come
to see how important our eyes ale. People who are nearsighted can only see things that are very close to their eyes. Many people who do a lot of close work, such as writing, reading and sewing, become nearsighted. Then they have to wear glasses in order to see distant things clearly. People who are farsighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty reading a book unless they hold it at arm’s length. If they want to do much reading, they must get glasses too. Other people don’t see clearly because their eyes are not exactly the right shape. This, too, can be corrected by glasses. Some people’s eyes become cloudy because of cataracts (白内障). Lo A. we are sick B. we can’t see clearly C. we wear glasses D. we burst into tears [单项选择]可引起瑞夷综合征药物是
A. 布洛芬 B. 吲哚美辛 C. 保泰松 D. 对乙酰氨基酚 E. 阿司匹林 [填空题]（）是由部署在监测区域内部或附近的大量廉价的、具有通信、感测及计算能力的微型传感器节点通过自组织构成的“智能”测控网络。
[简答题]简述隋唐五代时期农业发展概况。
[判断题]【判断题】高速磨煤机的形式一般有风扇式、锤击式。( )
A.正确 B.错误 [单选题] 甲于1月1日在家里吸毒，同年9月1日因盗窃被公安机关抓获，其主动交代吸毒行为。下列说法正确的是（ ）。 (1分)
A. 对甲的吸毒行为不应予以处罚 B. 甲系主动交代吸毒违法行为，可以不予处罚 C. 对甲的吸毒行为和盗窃行为都应予以处罚 D. 对甲的吸毒行为和盗窃行为任意处罚一种 [简答题]车站管理实行______，由上至下的顺序依次为：区域站站长、区域站副站长、专工、值班站长、值班员、站务员。
[单选题]接到地方政府或上级部门预警时,处于洪水泥石流台风等危险区域的井场应( )。
A.继续施工; B.立即撤离; C.关井后使现场设备井下处于安全状态,人员全部撤离; D.留部分骨干守后设备其他人员撤离。 [判断题]车站防毒面具滤毒盒有效期是5年。
A.正确 B.错误 [单选题]ZN65A-12T/4000型真空断路器每相回路电阻要求≤(____)μΩ。
A.20 B.50 C.40 D.100 [判断题]严禁无资质人员操纵机车。
A.正确 B.错误 我来回答: 提交
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