下面是某同学对铁及其金属部分知识学习和研究的过程. (1)对铁制品生锈的情况调查

题型:问答题

问题:

下面是某同学对铁及其金属部分知识学习和研究的过程.

(1)对铁制品生锈的情况调查:

调查内容掉漆的自行车裸露在混凝土以外的钢筋涂油的无锈铁钉镀铬铁质剪刀
铁制品锈蚀的现象风吹雨淋,时间长了,掉漆的部分会生锈时间长了钢筋表面出现锈层铁钉较长时间仍不生锈剪刀较长时间

不生锈

从调查中可知铁制品生锈的主要条件是______;下列保护铁资源的建议中,正确的是______.(填字母)

A.防止铁制品腐蚀B.回收利用废旧铁制品C.任意开采铁矿石

(2)锰和铁一样也是一种常见的金属元素,而且锰的相对原子质量是55,与铁也相近.那么锰与铁的金属活动性谁更强些呢?对此问题,探究如下:

实验设计:相同温度下,取大小相同的两种金属薄片,用砂纸将表面擦光亮,分别投入等体积、等浓度且足量的稀盐酸中反应,观察现象.

请分析回答下列问题:

①两种金属投入盐酸前用砂纸将表面擦光亮,其目的是______.

(A)除去氧化膜,便于直接反应(B)使表面不平整,易反应(C)使表面光亮,易观察(D)提高金属温度,加快反应速度

②根据下表中的现象填写结论.

金属
与盐酸反应现象放出气泡速度缓慢放出气泡速度较快
结论______
③除了比较与酸反应产生气体速度的快慢,你还有其他化学方法可比较这二种金属活动性的强弱吗?请举出一种方法(写出原理即可)______.

(3)右图是一氧化碳与氧化铁反应装置的示意图,请回答下列问题.

①写出图中A、B、C三处的化学反应方程式及其现象:______

②该实验说明一氧化碳具有______、______、______等化学性质

考点:金属的锈蚀与防护一氧化碳还原氧化铁金属活动性一氧化碳的性质和用途
题型:问答题

The Writers' Strike:Making the Best of the Worst

By now you are probably feeling the effects of the TV writers’ strike---the decision of television writers to stop working. With few new TV shows, I present to you a list of shows available on DVD worth your viewing time to keep you going during this painful period.

Arrested Development is one of the funniest and most clever shows ever to have appeared on network TV. With a most perfect cast(全体演员), the show sets out to cover the daily happenings of the Bluth family, a group of selfish staff who manage to still put family first.

For more comedy goodness, I recommend one of the sharpest comedies to have ever broadcast, 30 Rock. Starring Tina Fey and Alec Baldwin, two stars with impressive comic timing, the show gives you a glimpse into the making of a sketch show (幽默短剧),similar to Saturday Nigth Live, from the funny writers to the self-centered cast all the way up to the boss.

If you are looking for something more serious, or perhaps Friday Night lights might be more to your liking. If you are a fan of football, this show is probably for you. If you are a fan of great drama, both soapy and serious, this show is probably for you, If you are a fan of good-looking people, this show is definitely for you .

If those shows were not enough for you, might I recommend a show with a more heart-pounding excitement? The Amazing Race, after twelve seasons, still remains one of the most exciting shows on TV. Teams of two travel the globe with little to no money and experience far-out adventures in an attempt to remain the last team standing.

小题1:If you are fond of soapy TV shows, you will probably choose to watch      .

A.Friday Night Lights

B.30 Rock

C.the Amazing Race

D.Saturday Night Live小题2:From the DVD shows listed above, we can learn that   .

A.two teams won the amazing race

B.football fans enjoy the Amazing Race

C.the Bluths care about their family though selfish

D.30 Rock and Saturday Night Live have nothing in common小题3:The author writes the passage to tell us that       .

A.the effects of the TV writers’ strike are great

B.the strike puts TV shows in the worst situation

C.watching DVD is a good choice during the strike

D.we should choose DVD shows according to our tastes小题4:The passage is most probably taken from      .

A.a book review

B.a newspaper

C.a film poster

D.a DVD menu

题型:问答题

有人深夜在要害部门闲逛,保卫员认为有可疑的迹象,应进行()。

A、不予理睬

B、跟踪蹲守观察

C、立即报警

D、上前盘问

题型:问答题

肺炎支原体或衣原体肺炎,首选的抗生素是()。

A.青霉素 

B.头孢拉定 

C.阿奇霉素 

D.万古霉素 

E.庆大霉素

题型:问答题

对麻醉医生来说,术前哪项最重要()

A.现病史

B.个人史

C.既往史

D.既往手术麻醉史

E.治疗用药史

题型:问答题

修理橡套电缆对护套层进行整段割除时一般不宜大于()mm.

A.300

B.500

C.600

D.750

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