诡辩是一种以非为是，以是为非，是非无度的辩术。然而，在辩论过程中，为了摆脱困境，避免

Cheating is when a person misleads, deceives or acts dishonestly on purpose. 小题1:If a basketball team is for kids under 8,it's cheating for a 9-year-old play on the team. At school, in addition to cheating on a test, a kid might cheat by stealing someone else's idea for a science project. 小题2:This kind of cheating is called plagiarizing (抄袭).

小题3:Jeff is doing it by sneaking answers to a test. And it's also cheating to break the rules of a game or contest or to pretend something is yours when it isn't. When people cheat, it's not fair to other people.

It's tempting(诱惑人的) to cheat because it makes difficult things seem easy, like getting all the right answer on the rest. 小题4:And it won't help on the next test-unless the person cheats again.

小题5:They want to get good grades but hate hard work. Other kids might feel like they can't pass the test without cheating. Even though there seems to be a "good reason" for cheating, cheating isn't a good idea.

A．Some kids cheat because they're lazy.

B．Cheating can happen in a lot of different ways.

C．But it doesn't solve the problem of not knowing the material.

D．Some kids cheat once and feel so bad that they never do it again.E. For kids, cheating may happen at school, at home, or while playing a sport.

F. There are plenty of reasons why a kid shouldn't cheat, but some kids have already cheated.

G. Kids may also cheat by copying a book report off the Internet and handing it in as it's his or her original work.

金属材料是现代生活和工业生产中应用极为普遍的一种物质．

（1）钛和钛的合金是21世纪重要的金属材料，具有熔点高、抗腐蚀性强、与人体有很好的相容性等优良性能．金属的下列用途：①用来作保险丝；②用来制人造骨；③用于制造船舶；④用于制造航天飞机．其中与钛合金性不能相符的是（填序号）______．

（2）铁是一种最重要的金属材料，炼铁厂常以焦炭、赤铁矿、空气等为主要原料炼铁，其反应的主要过程如下：

试写出第③步反应的化学方程式______．

（3）防止金属制品锈蚀是保护金属资源一种有效的途径．为探究铁生锈的条件，某同学设计了如下图所示的探究实验：

一周后发现，A、B试管中的铁钉均没有明显的变化，而C试管中的铁钉表面有明显的铁锈出现，且铁钉与水面接触的部位锈蚀情况最严重．

①请你根据以上实验现象，总结铁生锈的原因______；

②出一种生活中防止钢铁制品生锈的具体方法______．

3岁儿童人幼儿园时体检发现HBsAg阳性，HBeAg阳性，抗HBc阳性，肝功能正常，最可能的诊断是（）

A.无症状HBsAg携带者

B.慢性乙型肝炎轻度

C.慢性乙型肝炎中度

D.HBV既往感染

E.急性无黄疸型乙型肝炎

根据所给资料回答下列问题。

下列城市中，2013年8月房价最高的城市是：（）.

A．上海

B．天津

C．深圳

D．温州

有重要负荷的用户，在已取得供电企业供给的保安电源后，无需采取其他应急措施