更多“RLredlens表示红色滤光镜.用于检测双眼同时视功能、平”相关的问题
鉴别Cushing综合征与肥胖症，下列哪一项指标较好（ ）
A.血浆皮质醇浓度 B.血浆ACTH水平 C.血糖 D.尿游离皮质醇 E.尿17-羟皮质醇
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一青年，8月20日发病，身冷、发热，头痛，呕吐2次，3d后体温达39℃，精神不振。查体：嗜睡状，结膜及面部充血，腮腺不大，无淋巴结肿大，颈强(+)，浅反射消失，深反射正常，尿常规：蛋白(±)，WBC
A．乙型脑炎
B．腮腺炎脑炎
C．结核性脑膜炎
D．钩体病(脑膜炎)
E．流感
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大气环境影响预测方案的设计，关键因素是（）。
A.选择污染源及其排放方案
B.确定污染源的预测因子
C.拟建项目污染治理方案的设计
D.合理选择污染源的组合方案
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Diseases of Agricultural Plants Plants, like animals, are subject to diseases of various kinds. It has been estimated that some 30,000 different diseases attack our economic plants; forty are known to attack corn, and about as many attack wheat. The results of unchecked plant disease are all too obvious m countries which have marginal food supplies. The problem will soon be more widespread as the population of the world increases at its frightening rate. Even in countries which are now amply fed by their agricultural products there could soon be critical food shortages. It is easy to imagine the consequences of some disastrous attack on one of the major crops; the resulting famines could kill millions of people, and the resulting hardship on other millions could cause political upheavals disastrous to the order of the world. Some plants have relative immunity to a great many diseases, while others have a susceptibility to them. The tolerance of a particular plant changes as the growing conditions change. A blight may be but a local infection easily controlled; on the other hand it can attack particular plants in a whole region or nation. An example is the blight which killed virtually every chestnut tree in North America. Another is the famous potato blight in Ireland in the last century. As a result of that, it was estimated that one million people died of starvation and related ailments. Plant pathologists have made remarkable strides in identifying the pathogens of the various diseases. Bacteria may invade a plant through an infestation of insect parasites carrying the pathogen. A plant can also be inoculated by man. Other diseases might be caused by fungus which attacks the plant in the form of a mold or smut or rust. Frequently such a primary infection will weaken the plant so that a secondary infection may result from its lack of tolerance. The symptoms shown may cause an error in diagnosis, so that treatment may be directed toward bacteria which could be the result of a susceptibility caused by a primary virus infection.
A. Some plants have relative immunity to a great many diseases, while others have a susceptibility to them.B. The tolerance of a particular plant changes as the growing conditions change.C. A blight killed virtually every chestnut tree in North America.D. A blight may be a national infection.
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水硬性胶凝材料既能在空气中硬化，也能在水中凝结、硬化、保持和发展强度，而气硬性胶凝材料只能在空
水硬性胶凝材料既能在空气中硬化，也能在水中凝结、硬化、保持和发展强度，而气硬性胶凝材料只能在空气中凝结、硬化、保持和发展强度。 此题为判断题(对，错)。请帮忙给出正确答案和分析，谢谢！
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影响甲烷转化反应平衡的因素有哪些
A. 催化剂活性 B. 水碳比 C. 温度 D. 压力
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自适应自动舵与普通自动舵比较，其主要优点是（） ①自动确定各项系数； ②进行最佳控制； ③减少操舵次数和舵角。
A.①～③
B.①②
C.①③
D.②③
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在固定不旋转的制动底板上有（）个支撑销，支撑着两个弧形制动蹄的下端。
A.2 B.4 C.6 D.8
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通过Internet发送和接受电子邮件(E-mail)的首要条件是应该有一个电子邮件(E-mail)地址,它的正确形式是( )
A. 用户名@域名 B. 用户名#域名 C. 用户名/域名 D. 用户名.域名
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某一氨基酸晶体溶于pH7.0的水中，所得溶液的pH为8.0，则此氨基酸的pI点必大于8.0。
A . 对B . 错
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Questions 24 and 25 are based on the following news. At the end of the news item, you will be giv...Recent tensions between the two countries were a direct result of（）
A．their border conflicts.
B．their military build-up.
C．killings in the two countries.
D．their mutual distrust.
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每边机翼有几块缝翼（）
A.3
B.2
C.6
D.4
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题目内容
（请给出正确答案）
参考答案
十点题库官方参考答案
（由十点题库聘请的专业题库老师提供的解答）
