弯翅卷刚毛雌果蝇与直翅直刚毛雄果蝇杂交,在F1中所有雌果蝇都是直翅直刚毛,所有雄

题型:填空题

问题:

弯翅卷刚毛雌果蝇与直翅直刚毛雄果蝇杂交,在F1中所有雌果蝇都是直翅直刚毛,所有雄果蝇都是直翅卷刚毛。控制翅型和刚毛的基因分别位于_____和_____染色体上(如果在性染色体上,请确定出X或Y)。控制翅型和刚毛的基因分别用A、a和B、b表示,F1雌雄果蝇的基因型分别为_____和_____。F1雌雄果蝇互交,F2中直翅直刚毛果蝇所占比例是______。

考点:基因型和表现型生物的性状
题型:填空题
计算:
(1)
12
72

(2)
3
2
20
•(-
15
)•(-
1
3
48
)

(3)4
ab3
1
2
a3b

(4)
3
10
5ab
c
5
3
2ac
b
•(-2
15bc
a
)

(5)3
2
2
3
×(-
1
8
15
1
2
2
5

(6)
1
m+n
×
1
m-n
÷
1
m2-n2
(m>n)
题型:填空题

根据《合同法》规定,当事人签订融资租赁合同,应当采用书面形式。这不属于()。

A.要式法律行为

B.单方法律行为

C.不要式法律行为

D.附条件法律行为

题型:填空题

几位同学对炭粉与氧化铁的反应十分感兴趣,自己动手,对过量炭粉与氧化铁反应中气体产物的成分进行了研究。

[提出假设] 该反应中的气体产物可能是CO或者是CO2和CO的混合物。

[查阅资料] 氮气不与碳、氧化铁发生反应。实验室可以用饱和氯化铵溶液和饱和亚硝酸钠(NaNO2)溶液混合加热反应制得氮气。

[设计方案] 如图所示,将一定量的氧化铁在隔绝空气的条件下与过量炭粉完全反应,测定参加反应的碳元素与氧元素的质量比。

试回答下列问题:

称取3.20g氧化铁、2.00g炭粉混合均匀,放入质量为48.48g的硬质玻璃管中;待反应结束,再通一段时间的氮气。冷却至室温,称得硬质玻璃管和固体总质量为52.24g。经进一步测定得知参加反应的碳元素质量为0.48g,参加反应的氧元素质量为0.96g。从而确认该反应的气体产物是CO2和CO的混合物,理由是()。根据数据处理结果判断,反应产生的气体中n(CO2):n(CO)=()。

题型:填空题

What's your dream vacation? Watching wildlife in Kenya? Boating down the Amazon? Sunbathing in Malaysia? New chances are opening up all the time to explore the world. So we visit travel agents, compare packages and prices , and pay our money.

We know what our vacation costs us. But do we know what it might cost someone else? It's true that many poorer countries now depend on tourism for foreign income. Unfortunately, though, tourism often harms the local people more than it helps them.

It might cost their homes and lands. In Myanmar, 5,200 people were forced to leave their homes among the pagodas(佛塔)in Bagan so that tourists could visit the pagodas.

Tourism might also cost the local people their livelihood and dignity. Local workers often find only menial(卑微的)jobs in the tourist industry. And most of the profits do not help the local economy. Instead, profits return to the tour operators in wealthier countries, When the Maasai people in Tanzania were driven from their lands, some moved to city slums. Others now make a little money selling souvenirs or posing for photos.

Problems like these were observed more than 20 years ago. But now some non-government organizations, tour operators and local governments are working together to begin correcting them. Tourists, too, are putting on the pressure.     

The result is responsible tourism, or “ethical tourism.” Ethical tourism has people at its heart. New international agreements and codes of conduct can help protect the people's lands, homes, economies and cultures. The beginnings are small, though, and the problems are complex.

But take heart. The good news is that everyone, including us, can play a part to help the local people in the places we visit. Tour operators and companies can help by making sure that local people work in good conditions and earn reasonable wages.

They can make it a point to use only locally owned hotel, restaurants and guide services. They can share profits fairly to help the local economy. And they can involve the local people in planning and managing tourism.

What can tourists do? First, we can ask tour companies to provide information about the conditions of local citizens. We can then make our choices and tell them why. And while we're abroad, we can:

Buy local foods and products, not imported ones.

Pay a fair price for goods and services and not bargain for the cheapest price.

Avoid flaunting wealth.

Ask before taking photographs of people.

They are not just part of the landscape!

Let's enjoy our vacation and make sure others do, too.

小题1: What is probably the best title for the article?

A.Tourism Causes Bad Effects.

B.Tourism Calls for Good Behavior.

C.Vacations Bring a Lot of Fun.

D.Vacations Cost More Than You Think小题2: Which of the following is not mentioned?

A.Local people were well paid to leave their lands.

B.Tourists may stay in hotels opened by local people.

C.Local people are mainly provided with low-paying work.

D.Tourists could bargain with local people for a reasonable price.小题3: The underlined phrase "take heart" means"      ".

A.pay attention

B.take care

C.cheer up

D.calm down小题4: According to the passage, the writer thinks          .

A.tourism is not a promising industry

B.dream vacations should be spent abroad

C.the problems caused by tourism are easy to settle

D.tourists should respect local customs and culture

题型:填空题

在德意志联邦共和国制定法中占比例较大的是()

A.民商法

B.经济法

C.刑法

D.诉讼法

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