目前电力系统中的变压器中性点接地方式主要有：（）、经（）接地、经（）接地、经（）接地

化简：3(x²-2xy)-2(x²-2y)+(x²-4y)。

某研究所与某有限责任公司于2000年6月8日签订了“无菌发酵生产”技术转让合同，由研究所向该公司转让“无菌发酵生产”的全部图纸及一套样品。合同未约定后续技术成果的分享办法。一年以后，研究所又对“无菌发酵生产”技术进行了改造，研制成“无菌发酵生产机器”。对于该改进后的无菌发酵生产技术， ( )是正确的。

A．该公司有权与某研究所分享该改进后的技术

B．该公司有权无偿使用该改进后的技术

C．该公司在某研究所转让该改进后的无菌发酵生产技术时，在同等条件下有优先受让权

D．该公司无权分享该改进后的技术

During adolescence(青春期), peers（同龄人） play a large part in a young person's life and typically replace family as the center of a teen's social activities. Some kids give in to peer pressure because they want to be liked or because they worry that other kids may make fun of them if they don't go along with the group. Others may go along because they are curious to try something new that others are doing. The idea that "everyone's doing it" may influence some kids to leave their better judgment, or their common sense, behind. 

As children grow, develop, and move into early adolescence, contacts with one's peers and the attraction of peer identification (认同)increases. As pre-adolescents begin rapid physical, emotional and social changes, they begin to question adult standards and the need for parental guidance. They find it good to turn for advice to friends who understand— friends who are in the same position themselves. By trying new things and testing their ideas with their peers, there is less fear of being laughed at.

There are two levels of peer pressure. The first is in the large group: for most teens a school or a youth group are examples. This is the situation that gets the most attention. The second is in the close relationship with one or several best friends. This is the situation that is sometimes disregarded. The large group puts a general pressure on its members. It sets the standard for clothing, music, entertainment, and "political correctness". The pressure can be avoided by keeping quiet or by putting on the appearance of agreement.

小题1:Why can’t some children follow their common sense?

A．Because they want to be liked by everybody.

B．Because they don’t want to make fun of others.

C．Because they are curious about their new friends.

D．Because they think all the children will do the same.小题2:When in pre-adolescence, who may children ask for suggestions?

A．Parents

B．Teachers

C．Friends

D．Classmates小题3:Which word can replace the underlined word disregarded in the last paragraph?

A．unnoticed

B．mentioned

C．disagreed

D．avoided小题4:What might be discussed in the following paragraph?

A．The reasons of peer pressure.

B．The advantages of peer pressure.

C．Peer pressure from close friends.

D．Peer pressure from a youth group.

（）备案的建筑起重机械备案有效期限不得超过制造厂家或安全技术标准规定的生产使用年限。

A.二次

B.首次

C.重复

D.连续

尽管有关法律越来越严厉，盗猎现象并没有得到有效抑制，反而有愈演愈烈的趋势，特别是对犀牛的捕杀。一只没有角的犀牛对盗猎者是没有价值的，野生动物保护委员会为了有效地保护犀牛。计划将所有的犀牛角都切掉，以使它们免遭被杀害的厄运。 野生动物保护委员会的计划假设了以下哪项( )

A．盗猎者不会杀害对他们没有价值的犀牛

B．犀牛是盗猎者为获得其角而猎杀的唯一动物

C．无角的犀牛比有角的对包括盗猎者在内的人的威胁要小

D．无角的犀牛仍可成功地对人类以外的敌人进行防卫