人类有多种血型系统,MN血型和Rh血型是其中的两种。MN血型由常染色体上的1对等位基

题型:单项选择题

问题:

人类有多种血型系统,MN血型和Rh血型是其中的两种。MN血型由常染色体上的1对等位基因M、N控制,M血型的基因型为MM,N血型的基因型为NN,MN血型的基因型为MN;Rh血型由常染色体上的另1对等位基因R和r控制,RR和Rr表现为Rh血型阳性,rr表现为Rh血型阴性;这两对等位基因自由组合。若某对夫妇中,丈夫和妻子的血型均为MN型-Rh阳性,且已生出1个血型为MN型-Rh血型阴性的儿子,则再生1个血型为MN型-Rh血型阳性女儿的概率是()

A.3/8

B.3/16

C.1/8

D.1/16

考点:高中生物基因的分离定律基因的分离定律题库
题型:单项选择题

下图是撒哈拉以南的非洲四个国家主要出口商品占本国出口商品总额的百分比统计图。据图回答下列各题。

小题1:据图中信息可以推断出森林面积广大的是(    )

A.赞比亚  

B.博茨瓦纳

C.尼日利亚

D.刚果(布)小题2:据图中信息可以推断四国的经济特征都是(    )

A.工业十分发达

B.“进口—加工—出口”型经济

C.农业十分发达

D.以单一商品出口经济为主

题型:单项选择题

北美和西属拉美独立运动胜利的相似原因有

①受欧美资产阶级革命的鼓舞 ②人民群众的支持和军队的顽强斗争

③杰出人物的领导 ④革命力量的团结和行动的统一 [ ]

A.①②③

B.②③④

C.①③④

D.①②④

题型:单项选择题

阅读表达(共5小题;每小题2分,满分10分)

阅读下面短文,并根据短文后的要求回答问题。(注意字数要求)。(答案写在答题卷的横线上)

Being healthy means taking care of yourself physically and mentally. Here are some of my best tips on how to do both:

Break a bad habit. You don’t really “break” habits. You replace the unwanted behavior with something that prevents you from doing it and that doesn’t have unhealthy side effects. So if your problem is that you eat too much when you get home from work, find something new to do that is incompatible(不能共存的)with what you usually do. You can’t walk around the track at the school and pig out in your kitchen at the same time.

Grow your marriage. Relationships are negotiated, and the negotiation never stops. It’s always a give-and-take, always requires work. It’s like if you planted a garden and came back six months later----you wouldn’t even be able to find it. You have to tend it, feed it, weed it, deal with the problems.

Beat stress.  My dog, Maggie, is the best anti – stress tool I have. A few minutes petting, scratching or playing with her, and                            . Exercise also helps. Just about every day, I’m on the tennis court. It’s a great workout, and if I don’t have that, I don’t cope as well, sleep as well or think as well.

Refocus your anger. Expressing your anger is just not that good an idea. You say things you don’t mean. Instead, recognize that anger is usually a symptom of hurt, fear or frustration(挫折), and deal with the causes rather than blow up. When you do that, you’re a problem solver.

Don’t medicate with food.

It never, ever works. You’re denying your issue by eating your way through it, instead of saying, Hey, I’ve got a problem.

1.What’s the best title? (Answer within 10 words.)

_____________________________________________________________

2.Fill in the blank in the passage in your own words.(Answer within 10 words.)

_____________________________________________________________

3.Complete the following statement with proper words.(no more than 4words).

Marriages are much like gardens. You need to _______________ your marriage as you do to your garden. It takes much effort to maintain your marriage. If there is a problem, you should deal with it immediately

4.What does the word “it” (paragraph 2) probably refer to? (no more than 3 words)

_____________________________________________________________

5.How to refocus your anger according to the whriter? ( Answer within 30 words.)

_____________________________________________________________

_____________________________________________________________

题型:单项选择题

公安行为

题型:单项选择题

0.5,1,2,5,17,107,( )

A.1947

B.1945

C.1943

D.1941

更多题库