更多“”相关的问题
在服务器端运行，用来增加网页的交互性的技术是什么？（）
A.Active X
B.Java Script
C.Java Applet
D.公共网关接口（CGI）
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下列可以绘制尺寸界线的线型是（）
A．粗点画线
B．细实线
C．粗实线
D．细点画线
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商业银行投资入股保险公司应严格遵守（）经营的规定，不断完善与其投资的保险公司之间的防火墙制度。
A.统一法人
B.法人分业
C.独立核算
D.交易规避
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Black Holes Most scientists agree that black holes exist but are nearly impossible to locate. A black hole in the universe is not a solid object, like a planet, but it is shaped like a sphere (球体). Astronomers (天文学家) think that at the center of a black hole there is a single point in space with infinite(无限的)density(稠密), This single point is called a singularity (奇点). If the singularity theory is correct, it means that when a massive star collapses, all the material in it disappears into the singularity. The center of a black hole would not really be a hole at all, but an infinitely dense point. Anything that crosses the black hole is pulled in by its great gravity. Although black holes do exist, they are difficult to observe. These are the reasons. · No light or anything else comes out of black holes. As a result, they are invisible to a telescope. · In astronomical terms, black holes are truly. For example, a black hole formed by the collapse of a giant star would have an event horizon(视界) only 18 miles across. · The nearest black holes would be dozens of light years away from Earth. One light year is about 6 trillion (万亿) miles. Even the most powerful telescopes could not pick out an object so small at such a great distance. In 1994 the Hubble Space Telescope provided evidence that black holes exist. There are still answers to be found, however, so black holes remain one of the mysteries of the universe.
Most scientists agree that black holes exist but are nearly impossible to locate. A black hole in the universe is not a solid object, like a planet, but it is shaped like a sphere (球体). Astronomers (天文学家) think that at the center of a black hole there is a single point in space with infinite(无限的)density(稠密), This single point is called a singularity (奇点). If the singularity theory is correct, it means that when a massive star collapses, all the material in it disappears into the singularity. The center of a black hole would not really be a hole at all, but an infinitely dense point. Anything that crosses the black hole is pulled in by its great gravity.
Although black holes do exist, they are difficult to observe. These are the reasons.
· No light or anything else comes out of black holes. As a result, they are invisible to a telescope.
· In astronomical terms, black holes are truly. For example, a black hole formed by the collapse of a giant star would have an event horizon(视界) only 18 miles across.
· The nearest black holes would be dozens of light years away from Earth. One light year is about 6 trillion (万亿) miles. Even the most powerful telescopes could not pick out an object so small at such a great distance.
In 1994 the Hubble Space Telescope provided evidence that black holes exist. There are still answers to be found, however, so black holes remain one of the mysteries of the universe.
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根据支付客户的类型不同，网上特约商户分为网上平台类商户和网上普通类商户。
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下列关于物业服务合同的说法，错误的是：
A．建设单位与物业服务企业签订的前期物业服务合同，对业主不具有约束力
B．物业服务企业向业主委员会提出物业费主张的，人民法院应当告知其向拖欠物业费的业主主张权利
C．物业服务合同终止后，物业服务合同不需要退还已经预收的物业费
D．物业服务合同终止后，物业服务企业可以以存在事实上的物业服务关系为由请求业主支付物业费
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双圆柱销的槽轮机构,拨盘每转动一次,拨动槽轮转过两个径向槽。()（2.0分）
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青黛的功效是：清热解毒，凉血利咽，清肺化痰，定惊。
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与药物共制能缓和药物的燥性，增强疗效，矫正气味的辅料是
A.醋
B.盐水
C.蜂蜜
D.麦麸
E.河砂
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A . 过程管理人B . 项目监理人C . 项目负责人D . 系统测试人
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巴利尔斯－Pb、Zn异常，肯定有矿，应研究的问题
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因（）原因造成旅客不能按车票载明的日期、车次乘车的，铁路运输企业应承担相应的法律责任。 A．不可
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10月龄男婴，2007年10月突发水样便腹泻，10余次／天。伴呕吐、发热、轻度脱水。大便性状开始为蛋花状，后为水样。该患者所患胃肠炎的致病因子以下哪种最有可能（）
A.痢疾杆菌 B.A组轮状病毒 C.空肠弯曲菌 D.B组轮状病毒 E.杯状病毒
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溢流阀的调定压力为30x105Pa，其远程控制口与油箱接通时，系统的压力p为（）
A、随负载而定
B、零
C、30x105
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