化学反应的程度与反应物的浓度之间有一定的规律可循.某实验小组各取等质量的木炭和等

题型:填空题

问题:

化学反应的程度与反应物的浓度之间有一定的规律可循.某实验小组各取等质量的木炭和等质量的硫分别在容积相同的集气瓶中燃烧.

(1)记录如下:②木炭在氧气中燃烧比在空气中燃烧更旺,发出白光,放出更多的热量.木炭燃烧的化学方程式为:___________.④硫在氧气中燃烧发出明亮的蓝紫色火焰,放出更多的热量.硫燃烧的化学方程式为:___________.

(2)
实验实验现象
实验现象
反应表达式式
A①木炭在空气中燃烧①木炭红热产生的气体都能是澄清石灰水变浑浊_________________

②木炭在氧气中燃烧②____________

B③硫在空气中燃烧③微弱的淡蓝色火焰产生的气体都有刺激性气味_________________

④硫在氧气中燃烧④______________

(3)通过A、B两组对比实验的现象,可以得出的规律是: ____________________

考点:S,Fe,C,P等物质在氧气中的燃烧
题型:填空题

--- It’s too hot. What about having a glass of cold drink?  

---       ___

A.Sounds good

B.Good luck

C.That's right

D.Me, too

题型:填空题

阅读下面短文,从短文后各题所给的四个选项(A、B、C 和 D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

                                    A Heroic Driver

Larry works with Transport Drivers. Inc. One morning in 2009. Larry was  41

along 165 north after delivering to one of his    42   . suddenly, he saw a car with its bright lights on.    43    he got closer, he found 44    vehicle upside down on the road. One more look and he noticed    45    shooting out from under the    46    vehicle. Larry pulled over, set the brake and    47   the fire extinguisher (灭火器). Two good bursts from the extinguisher and the fire was put out.

The man who had his bright lights on    48    and told Larry he had    49    an emergency call. They    50    heard a woman’s voice coming from the wrecked (毁坏的) vehicle.    51   the vehicle, they saw that a woman was trying to get out of the broken window. They told her to stay    52    until the emergency personnel arrived,    53    she thought the car was going to    54   . Larry told her that he had already put out the fire and she should not move    55    she injured her neck.

Once fire and emergency people arrive, Larry and the other man    56    and let them go to work. Then, Larry asked the    57    if he was needed or    58    to go. They let him and the other man go.

One thing is    59   —Larry went above and beyond the call of duty by getting so close to the burning vehicle! His    60    most likely saved the woman’s life.

42()

A.passengers

B.colleagues

C.employers

D.customers

题型:填空题

19世纪晚期,欧美工人运动出现了有组织的斗争增多,以合法斗争为主要形式,经济斗争多于政治斗争等特点,最根本原因是:()

A.革命处于低潮时期

B.机会主义思潮泛滥

C.第二次工业革命影响

D.欧美各国社会稳定

题型:填空题

某公司2011年初发行在外普通股2500万股,2011年4月1日新发行500万股,11月1日回购120万股,2011年实现净利润1600万元,则基本每股收益为()元。

A.0.45 

B.0.56 

C.0.75 

D.0.85

题型:填空题

酒蒸后可减少副作用的药材是()

A.肉苁蓉

B.女贞子

C.山茱萸

D.地黄

E.五味子

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