落石和小型崩塌可采用的防治方法有（） A.清除危岩 B.支护加固 C.拦挡工程 D.

间歇性疼痛包括（）

A.体位性疼痛

B.温差性疼痛

C.间歇性跛行

D.运动性疼痛

在井下安装钻机设备前，要做到（）

A、检查、整修设备

B、检查加固钻场及其周围支架

C、清理各种杂物

D、挖好清水池和疏水沟

阅读理解。

     As they migrate (迁移), 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 on 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 travel 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 when farmers decide

when to spray their crops.

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

A. Insects migrate with the seasons.

B. 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 favourable 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 from 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

5. According to the passage, the findings can _____. [ ]

A. increase insects in number 

B. instruct farmers when to spray

C. prevent climate warming

D. help protect insects

男，自马车上摔下，头后枕部着地，颈部活动受限，下颈椎压痛明显，四肢弛缓性瘫，躯干感觉平面在胸骨柄以下，痛、温觉小时，不能自行排尿，诊断应首先考虑（）

A.颈椎间盘突出症

B.颈椎骨折脱位并臂丛神经与腰骶从神经损伤

C.颈部软组织损伤

D.颈椎骨折脱位并颈髓损伤

E.胸椎骨折并脊髓损伤

要完善学校的班主任制度，高度重视班主任工作，选派思想素质好、业务水平高、奉献精神强的优秀教师担任班主任。