题目内容

Small shops offer products that range from inexpensive to expensive，______(depend)on the shop.

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問2 幸いいなことに、父の心臓の手術はうまくいった。心臓

A. しんぞう
B. しんそう
C. じんぞう
D. じんそう

下列短文中有十个空白，每个空白有四个选项。根据上下文要求选出最佳答案。 The basic principle of radar is illustrated by what happens when one shouts in a cave. The echo of the shouting (11) the walls helps a person determine the size of the cave. With radar，however，the waves are radio waves instead of (12) waves. Radio waves travel (13) the speed of light，about300,000 kilometers in a second. A radar set (14) a short burst of radio waves. Then it receives the echoes (15) when the waves bounce(反射)off objects. By determining the time it (16) for the echoes to return to the radar set，a trained technician (17) determine the distance between the radar set and other objects. The word“radar”， (18) ，gets its name from the term“radio detection and ranging. ”“Ranging”is the term for detection of the (19) between an object and the radar set. Besides being of critical importance to pilot，radar is (20) for air traffic control，for tracking ships at sea，and for tracking weather systems and storms.

A. can
B. must
C. ought to
D. has to

When you turn on the television，put on your shoes or drive to a store，you’re using energy. Energy is one of the most fundamental forces in the world. Animals use energy to walk and run. Trees and plants use energy to grow. People use it to work and play. Energy is everywhere in nature-in the light of the sun，in the wind，in the forest,in water currents and erupting volcanoes. Without energy，there is no life. We use our own energy constantly and we continually make use of all kinds of energy. Energy can be divided into two different types：stored energy and dynamic energy. Stored energy is caned potential energy，and the latter refers to energy in motion. If you stretch out a rubber band，this produces potential energy. If you let it go，it moves and produces the dynamic energy.

阅读下列说明，回答问题1至问题3。【说明】去年底某大型企业集团的财务处经过分析发现，员工手机通话量的80%是在企业内部员工之间进行的，而90%的企业内部通话者之间的距离不到1000m。如果能引入一项新技术降低或者免掉内部员工通话费，这对集团来说将能节省很大一笔费用，对集团的发展意义相当大。财务处将这个分析报告给了集团的总经理，总经理又把这个报告转给了集团信息中心主任李某，责成他拿出一个方案来实现财务处的建议。李某找到了集团局域网的原集成商A公司，反映了集团的需求。A公司管理层开会研究后命令项目经理章某积极跟进，与李某密切联系。章某经过调研，选中了一种基于无线局域网IEEE802. 11n改进的新技术“无线通”手机通信系统，也了解到有一家山寨机厂家在生产这种新技术手机。这种手机能自动识别“无线通”、移动和联通，其中“无线通”为优先接入。经过初步试验，发现通话效果很好，因为是构建在集团现有的局域网之上，除去购买专用无线路由器和这种廉价手机之外，内部通话不用缴费。而附近其他单位听说后，也纷纷要求接入“无线通”，于是章某准备放号并准备收取这些单位适当的话费。但等到“无线通”在集团内部推广时，发现信号覆盖有空白、噪声太大、高峰时段很难打进打出，更麻烦的是当地政府的主管部门要他们暂停并要对他们罚款。此时章某骑虎难下，欲罢不能。【问题1】造成这样局面的可能原因是什么章某在实施“无线通”时可能遇到的风险有哪些