When Christopher Columbus landed on a la

题型:阅读理解

问题:

When Christopher Columbus landed on a land without name in 1502, he saw many Indians wearing gold earrings. So he thought the land must be rich in gold. He named the place Costa Rica, which means “rich coast” in Spanish.

Though little gold was found, Costa Rica today is indeed rich with coffee and bananas. Coffee is the most important product in Costa Rica and most of it is exported  to other countries like America and West Germany. Bananas are the country’s second most important export.

Costa Ricans also grow many other crops such as fruits, corn and beans for their own use. Costa Ricans love colors and their houses are painted in bright colors.

Education is very important to the Costa Ricans. Almost every village has a school and education is a must for children between seven and fourteen years of age. Boys and girls go to separate  schools. Classes begin in March and end in November. The other three months of the year are harvest time and the children have to help their parents to pick coffee beans.

小题1:What’s the main idea of the first paragraph?

A.How Columbus found Costa Rica.

B.How Costa Rica got its name.

C.What the Costa Ricans wore.

D.What language the Costa Ricans spoke.小题2:The Costa Ricans may NOT paint their houses ______.

A.pink and red

B.grey and black

C.blue and green

D.yellow and orange小题3:In Costa Rica, boys and girls between seven and fourteen ______.

A.must go to school

B.study in the same school

C.do not have to go to school at all

D.can choose to stop schooling at any time小题4:From December to February, school children in Costa Rica ______.

A.have lessons every day

B.have their examinations

C.help their parents pick coffee beans

D.help their parents decorate their houses小题5:This passage is mainly about ______.

A.Christopher Columbus

B.Costa Rica

C.some products from Costa Rica

D.the education of Costa Rica

考点:政治经济类阅读历史文化类阅读
题型:阅读理解

选择作业活动的原则有()

A.首先应进行作业活动分析和患者功能状况的评估

B.不需根据患者个人爱好和兴趣来选择作业活动

C.考虑患者的文化背景

D.考虑患者的性别年龄

E.要让患者有成就感

题型:阅读理解

(8分)在户外聚会时,化学老师点燃了一支自制的蜡烛,同学们发现这支蜡烛不易被风吹灭,原来在蜡烛的棉芯里藏了两根相互缠绕的银白色金属丝。老师指出金属丝的成分可能是Mg、Al、Fe中的一种或两种。回校后,老师提供了Mg、Al、Fe三种已知金属和MgSO4、Al2(SO4)3、FeSO4、CuSO4四种盐溶液,以及未知金属的样品。指导同学们先进行了参照实验,之后探究未知金属的成分。

(1)三种已知金属的参照实验

试剂MgAlFe
MgSO4溶液有气泡产生。 “▲” “▲”
Al2(SO4)3溶液有大量气泡产生,一段时间后金属表面有白色固体附着。 “▲” “▲”
FeSO4溶液有大量气泡产生,一段时间后金属表面有灰黑色固体附着。试管底部有灰黑色固体析出。 “▲”
CuSO4溶液有大量气泡产生,一段时间后金属表面有红色固体附着。一段时间后金属表面有红色固体附着。一段时间后金属表面有红色固体附着。
用“▲”标记的实验有相同的现象,“▲”处应记录的是         ;表中的“灰黑色固体”的成分为_________。Al与CuSO4溶液反应的化学方程式为          

(2)未知金属成分的探究

该小组同学将两根未知金属丝分开,如图所示放入CuSO4溶液中,观察到的现象记录如下:

试剂两根未知金属丝
 

CuSO4溶液

一根金属丝上有大量气泡产生,另一根金属丝上没有气泡;一段时间后,两根金属丝表面都有红色固体附着。
       

通过与参照实验对比,可以获得的结论是:两种金属丝的成分不同,有气泡冒出的金属丝成分是        。用老师提供的试剂再进行一个实验,就能证明另外一种金属丝的成分,实验方案为      

(3)实验反思

同学们在反思实验原理时,提出还可将另一种金属直接放入稀硫酸或稀盐酸中,有的同学认为可以通过“金属产生气泡的快慢”这一现象进行判断,有的同学认为这种判断依据不够合理,理由是        。但是“将另一种金属直接放入稀硫酸或稀盐酸中”还是可以判断出金属的成分,依据的现象是       

题型:阅读理解

双胎输血综合征是哪类双胎妊娠的并发症()

A.双羊膜囊单绒毛膜单卵双胎

B.双羊膜囊双绒毛膜单卵双胎

C.双卵双胎

D.单羊膜囊单卵双胎

E.联体儿

题型:阅读理解

电压互感器的工作原理与变压器相同,运行中相当于二次侧绕组开路.

题型:阅读理解

开展中小学心理健康教育的基本原则之一是:根据学生心理发展特点和()发展规律,有针对性地实施教育。

A.身心

B.生理

C.品德

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