更多“冰川沉积”相关的问题
简述焊接切割设备保护接零和保护接地的安全要求。
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花键连接按齿型可分为（）。
A.半圆键
B.渐开线花键
C.三角形花键
D.矩形花键
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填开发票的单位和个人必须在发生经营业务确认营业收入开具发票。发票的开具时间应（）填开。
A.适时
B.提前
C.拖延
D.开未来发生票
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（）键对轴削弱最大。
A . 平键
B . 半圆键
C . 楔键
D . 花键
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下列材料保温性能最好的是（）。
A.加气混凝土 B.浮石混凝土 C.页岩陶粒混凝土 D.膨胀珍珠岩水泥制品
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周期性波浪式的高烧和低烧是（）的特征。
A.鼠疫
B.莱姆氏疏螺旋体病
C.单核细胞增多症
D.布鲁氏菌病
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患者男性，55岁，近2年出现头昏、乏力、面色苍白，伴上腹隐痛；无发热，小便正常，大便潜血（+）。血红蛋白70g/L，红细胞3.0×1012/L，白细胞6.5×109/L，血小板200×109/L...有关铁代谢，以下哪些叙述是正确的（）
A.铁的储存形式有铁蛋白
B.铁的储存形式有肌红蛋白铁
C.成年人正常情况下每天从食物中提取铁1～2mg
D.铁的吸收主要在回肠
E.铁的吸收主要在十二指肠
F.铁的储存形式有血红蛋白铁
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Passage Two First aid is emergency care for a victim of sudden illness or injury until more skillful medical treatment is available. It may save a life or improve certain vital signs including pulse, temperature, a clear airway, and breathing. In minor emergencies, first aid may prevent a victim’s condition from turning worse and provide relief from pain. First aid must be administered as quickly as possible. In the case of the critically injured, a few minutes can make the difference between complete recovery and loss of life. First-aid measures depend upon a victim’s needs and the provider’s level of knowledge and skill. Knowing what not to do in an emergency is as important as knowing what to do. Improperly moving a person with a neck injury, for example, can lead to permanent spinal(脊柱的) injury and paralysis(瘫痪). Despite the variety of injuries possible, several principles of first aid apply to all emergencies. The first step is to call for professional medical help. The victim, if conscious, should be reassured that medical aid has been requested, and asked for permission to provide any first aid. Next, assess the scene, asking other people or the injured person’s family or friends about details of the injury or illness, any care that may have already been given, and preexisting conditions such as diabetes or heart trouble. The victim should be checked for a medical bracelet or card that describes special medical conditions. Unless the accident scene becomes unsafe or the victim may suffer further injury, do not move the victim. First aid requires rapid assessment of victims to determine whether life-threatening conditions exist. One method for evaluating a victim’s condition is known by the acronym(首字母缩写) ABC, which stands for: A-Airway: is it open and clear B-Breathing: is the person breathing Look, listen, and feel for breathing. C-Circulation: is there a pulse Is the person bleeding externally Check skin color and temperature for additional indications of circulation problems.
A．remove him from the accident sceneB．turn him overC．call for professional medical helpD．examine him carefully
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双声道的立体声系统是最基本的能给人的双耳造成立体声像的系统。立体声系统除了双声道外，还有四声道、五声道、七声道等，一般说来，声道数量越多，聆听时的亲临现场感越强。()
A.完全正确
B.完全错误
C.无错误，但不完备
D.部分错误
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在下列固定资产折旧方法中，一般来说．（）有利于企业进一步发展。
A.年限平均法和工作量法 B.工作量法和年数总和法 C.年数总和法和双倍余额递减法 D.双倍余额递减法和年限平均法
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国家在（）全面取消了农业税。
A.2004年
B.2005年
C.2006年
D.2007年
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A . 前者各字节的最高位二进制值各为1,而后者为0B . 前者各字节的最高位二进制值各为0,而后者为1C . 前者各字节的最高位二进制值各为1、0,而后者为0、1D . 前者各字节的最高位二进制值各为0、1,而后者为1、0
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粗面内质网和滑面内质网在电镜下的主要区别是根据其表面是否附有
A . 核糖体B . 中心体C . 溶酶体D . 高尔基复合体
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水浸探头必须作适当固定，防止其颠覆或移位而失去监测作用。
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