读东非裂谷带部分示意图(如图)。回答1—2题。 1、甲被称作“地球上的伤痕”,

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问题:

读东非裂谷带部分示意图(如图)。回答1—2题。

1、甲被称作“地球上的伤痕”,其成因是[ ]

A、流水作用

B、地壳上升

C、板块张裂

D、人工开挖

2、东非裂谷带的地质构造属于 [ ]

A、背斜

B、向斜

C、褶皱

D、断层

考点:板块构造学说断块山
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短文填词。根据首字母提示,完成短文。

     Have you ever p  1   a few trees on Tree Planting Day? Each year, millions of people, both old and young,

men and women, plant a lot of trees. But this may not be the best way to make your home a g  2   place.

     Last week, we visited a park in Hebei. We were s  3   to find most of the trees had been b  4  . The workers

told us that the trees d  5   soon after they were planted, because they weren't watered well enough. So workers

burned them and cleaned the place for n  6   trees to be planted this year. On a card f  7   n one of the dead

trees, a student w  8  , "I hope this tree will grow up with me to b  9   the backbone (栋梁) of our country." The

workers said that the survival (存活) of the trees was really more important than how many trees were planted.

     Some people in Beijing now have a new idea that they can d 10   some money and let professionals

(专业人士) plant and take care of the trees.

1.                  2.                 3.                 4.                 5.               

6.                  7.                 8.                 9.                10.             

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如图所示,当开关S闭合,两表均有示数,过一会儿发现电压表示数突然变小,电流表示数突然变大,下列故障判断可能正确的是

A.L1短路

B.L2灯短路

C.L1灯丝断开

D.L2灯丝断开

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(4分)家中烧开水的铝壶和盛放开水的暖瓶,使用时间长了易结水垢(如图)。原因是硬水中含有较多的可溶性的钙和镁的化合物,其中碳酸氢钙[Ca(HCO3)2] 受热易分解,生成水和大量的气体,还生成一种难溶于水的化合物,它是水垢的主要成分。

[产生问题] 碳酸氢钙受热分解除了生成水以外,另外两种生成物是什么?

[提出假设] ① 小楠同学认为生成难溶于水的化合物可能是碳酸钙。

② 小卓同学根据           定律猜想生成物的气体可能是二氧化碳。

[实验与事实] 依据猜想他们设计了如下实验方案:

 实验步骤实验现象
验证猜想的①方案向生成的难溶于水的化合物中加入适量的            有气泡生成 
验证猜想②的方案取少量硬水于试管并加热,将生成气

体通入         中。

 可观察到         
[解释与结论]:水垢主要成分之一是碳酸钙。

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水火不济,心阳偏亢之心悸、失眠,治宜选用()。

A.朱砂安神丸

B.天王补心丹

C.酸枣仁汤

D.磁朱丸

E.柏子养心丸

题型:选择题

下列各项中,属于消费税税目的有()。

A.摩托车

B.游艇

C.成品油

D.鞭炮

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