保险合同的( )，是指与保险合同的人订立或履行有一定辅助关系的人，一般是指保险代理

贯切三个代表重要思想关键在坚持（），核心在坚持（），本质在坚持（）。

A.与时俱进；立党为公；执政为民

B.党的先进性；执政为民；立党为公

C.与时俱进；党的先进性；执政为民

D.科学反对迷信；执政为民；党的先进性

肠梗阻宜尽早手术治疗的是（）

A.肠套叠

B.蛔虫性肠梗阻

C.麻痹性肠梗阻

D.肠扭转

E.粘连性肠梗阻

有关气候叙述错误的是[ ]

A．海拔越高气温越低

B．山地迎风坡降水多温差小

C．地球纬度越低的地方，得到的太阳辐射越少

D．人类生产生活中大量排放二氧化碳等废气导致全球气温升高

水泥砼路面工程施工中应检测强度，此强度是指（）。

A、抗压强度

B、抗弯拉强度

C、抗剪强度

D、抗压缩强度

阅读理解

   As they migrate (迁徙), butterflies and moths choose the winds they want to fly with, and they change

their body positions if they start floating in the wrong direction. This new finding suggests that insects may

employ some of the same methods that birds use for traveling long distances. Scientists have long thought

that insects were simply at the mercy of the wind.

     Fascinating as their skills of flight are, migrating behavior has been difficult to study in insects because

many long distant trips happen thousands of feet above ground. Only recently have scientists developed

technologies that can detect such little creatures at such great heights.

     To their surprise, though, the insects weren't passive travelers in the winds. In autumn, for example,

most light winds blew from the east, but the insects somehow sought out ones that carried them south and

they positioned themselves to navigate directly to their wintering homes.

    Even in the spring, when most winds flowed northward, the insects didn't always go with the flow. If

breezes weren't blowing in the exact direction they wanted to go, the insects changed their body positions

to compensate. Many migrating birds do the same thing.

     The study also found, butterflies and moths actively flew within the air streams that pushed them along. By adding flight speeds to wind speeds, the scientists calculated that butterflies and moths can ravel as fast as 100 kilometers an hour. The findings may have real-world applications. With climate warming, migrating insects are growing in number. Knowing how and when these pests move could help farmers decide when to spray their crops.

1. What's the main idea of the text?

  A. Insects migrate with the seasons.

  B. The wind helps insects greatly in migrating.

  C. Windsurfing insects have real direction.

  D. Scientists have trouble in observing insects.

2. Scientists originally thought that _____________.

  A. insects always waited for their favorable winds

  B. insects chose the winds they wanted to ride

  C. insects were just blown about by the wind

  D. insects positioned themselves in the winds

3. It is not easy to study the migrating behavior of the insects because _____________.

  A. the little creatures can fly very fast      

  B. they have no regular migrating courses

  C. the wind's direction is hard to foresee  

  D. their flight is long and high above ground

4. We can learn form the text that _______________.

  A. insects fly in the way birds do

  B. insects travel more easily in autumn

  C. insects never position themselves when flying low

  D. insects rest a lot when the wind pushes them along