贝壳堤由死亡的贝类生物在海岸带堆积而成,在沿海地区经常分布着多条贝壳堤,标志着海岸线

题型:单项选择题 案例分析题

问题:

贝壳堤由死亡的贝类生物在海岸带堆积而成,在沿海地区经常分布着多条贝壳堤,标志着海岸线位置的变化,下图示意渤海湾沿岸某地区贝壳堤的分布。

河流冲积物是该地海岸线变动的物质来源。多条贝壳堤的形成说明河流入海口()

A、位置稳定,泥沙沉积量小

B、位置稳定,泥沙沉积量大

C、位置多次变动,泥沙沉积量小

D、位置多次变动,泥沙沉积量大

考点:高中地理外力作用与地貌外力作用与地貌题库
题型:单项选择题 案例分析题

阅读下面的短文。将画线部分的句子译成汉语。

     In the early days of the American West, life was difficult. People lived on farms away from other families.

 1. They went to town once a week or once a month. Then they saw their friends and neighbors. 2. On the

farms everyone had lots of work to do. And there was a big problem. One family couldn't build a house alone.

     Then, what did families do to build houses? 3. They asked their friends and neighbors for help. They

invited them to work in a group for a few days. The women cooked together. The men worked on the buildings. 4. For the children, it was like a holiday. There were many other children to play with. Together these people

built a house. They enjoyed working together. At another time the family with the new house would help their

neighbors.  

     Why don't we work with others? 5. It can be fun and life can become easier, too.

1.__________________________________________________________

2.__________________________________________________________

3.__________________________________________________________

4.__________________________________________________________

5.__________________________________________________________

题型:单项选择题 案例分析题

手术根治术中应切除肾脏+全输尿管+部分膀胱的是()

A.肾癌

B.肾胚胎瘤

C.膀胱癌

D.肾囊肿

E.肾盂癌

题型:单项选择题 案例分析题

如右图所示,一小球以初速度v0沿水平方向射出,恰好垂直地射到一倾角为30°的固定斜面上,并立即反方向弹回。已知反弹速度的大小是入射速度大小的3/4,则下列说法正确的是(    )

A.在碰撞中小球的速度变化大小为

B.在碰撞中小球的速度变化大小为

C.小球在竖直方向下落的距离与在水平方向通过的距离的比为

D.小球在竖直方向下落的距离与在水平方向通过的距离之比为

题型:单项选择题 案例分析题

结扎止血带时应尽量靠近伤口,选择部位时大腿宜在何处()

A.上2/3处

B.下2/3处

C.上1/3处

D.下1/3处

E.以上都不对

题型:单项选择题 案例分析题

食品包装中常用的干燥剂主要成分是氧化钙(CaO),氧化钙属于

A.氧化物

B.单质

C.混合物

D.碱

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