高斯函数[x]，也称为取整函数，即[x]表示不超过x的最大整数.
例如：[ 2.3]=2，[- 1.5]=-2
则下列结论:
①[- 2.1]+[1]=-2;
②[x]+[-x]=0;
③若[x+1]=3，则x的取值范围是2≤x<3;
④当-1≤x<1时，[x+1]+[-x+1]的值为0、1、 2.
其中正确的结论有（）(写出所有正确结论的序号).

Individuals and businesses have legal protection for intellectual property they create and own. Intellectual proper__62__from creative thinking and may include products, __63__, processes, and ideas. Intellectual property is protected__64__ misappropriation(盗用).Misappropriation is taking the Intellectual property of others with our__65__ compensation and using it for monetary gain. Legal protection is provided for the __66__of intellectual property. The three common types of legal protection are patents, copyrights, and trademarks. Patents provide exclusive use of inventions. If the US patent office __67__ a patent, it is confirming that the intellectual property is __68__. The patent prevents others from making, using, or selling the invention without the owner’s__69__ for a period of 20 years. Copyrights are similar to patents __70__that they are applied to artistic works. A copyright protects the creator of an __72__artisitic or intellectual work, such as a song or a novel. A copyright gives the owner exclusive rights to copy, __72__ display, or perform. the work.. The copyright prevents others from using and selling the work, the __73__ of a copyright is typically the lifetime of the author__74__an additional 70 years. Trademarks are words, names, or symbols that identify the manufacturer of a product and__75__it from similar goods of others. A service mark is similar to a trademark__76__is used to identify services. A trademark prevents others from using the__77__or a similar word, name, or symbol to take advantage of the recognition and__78__of the brand or to create confusion in the market place__79__registration, a trademark is usually granted for a period of ten years. It can be__80__fo additional ten-year periods indefinitely as__81__as the mark’s use continues.62. [A]retrieves [B]deviates [C]results [D]departs63.[A]services [B]reserves [C]assumptions [D]motions64. [A]for [B] with [C]by [D]from 65. [A] sound [B] partial [C] due [D] random 66. [A] users [B] owners [C] masters [D] executives 67. [A] affords [B] affiliates [C] funds [D] grants 68. [A] solemn [B] sober [C] unique [D] universal 69. [A] perspective [B] permission [C] conformity [D] consensus 70. [A] except [B] besides [C] beyond [D] despite 71. [A] absolute [B] alternative [C] original [D] orthodox 点击查看答案

不等式组x+2>0 2x-1≤0的所有整数解是（）

A.-1、0
B.-2、-1
C.0、1
D.-2、-1、0

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