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当前学科:青光眼
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眼压高低主要取决于房水循环中的哪些因素()
A . 睫状突生成房水的速率
B . 葡萄膜巩膜通道的大小
C . 上巩膜静脉压
D . 前房角的宽窄
E . 房水通过小梁网流出的阻力
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推荐知识点:
当空气中氨含量达到()(体积分数)时,即可点燃。
数据库管理系统主要适合用于()。
Many people prefer text messages(短信)to actually talking. Almost overnight, text messages have become the preferred form. of communication for millions. But even as industry calculations show that Americans are now using mobile phones to send or receive more text messages than phone calls. Those messages are under great pressure because of the danger they can pose by distracting users. Though there are no official casualty(伤亡)statistics, there is much evidence that the number of fatal accidents resulting from texting while driving, crossing the street or engaging in other activities is on the rise. "The act of texting automatically removes 10 I. Q. points," said Paul Saffo, a technology trend forecaster in Silicon Valley. "The truth of the matter is that there are hobbies that are incompatible(不相容的). You dont want to do mushroom-hunting and bird-watching at the same time, and it is the same with texting and other activities. We have all seen people walk into parking meters or walk into traffic and seem startled by oncoming cars. " In the latest fight against text messaging, the California Public Utilities Commission announced an emergency measure on Thursday temporarily banning the use of all mobile devices by anyone at the controls of a moving train. The ban was adopted after federal investigators announced that they were looking at the role that a train engineers text messaging might have played here last week in the countrys most deadly rail accident in four decades. A California lawmaker is also seeking to ban text-messaging by drivers, a step already taken by a handful of other states. "We have had far too many tragic incidents around the country that are painful proof that this is a terrible problem. " said Joe Simitian, who wrote the California law requiring drivers who are talking on a cell phone to use hands-free devices.What can we know from the second paragraph?A.Text messaging may result in many accidents.B.Text messaging has caused most of the accidents recently.C.Many people are going to text messages instead of telephoning.D.The government is now trying to stop text messaging.
造成常压塔底液面变化的原因有哪些?
在材料的制备过程中,一旦原材料确定之后,()就显得尤为重要。在整个材料领域中,各类材料均有相对应的各种制备工艺和方法,但归纳起来不外乎可分为气相法、液相法和固相法三大类之间。
自然系统的功能
六岁男孩,尿少,水肿2天,血压130/90mmHg,尿常规:蛋白(++),红细胞25个/HP,白细胞15个/HP。患儿在入院第2天突然出现头痛、恶心、呕吐、视物模糊,并抽搐一次,此时应考虑出现()
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