MRI诊断早期股骨头缺血性坏死的病理基础是（） A.关节软骨坏死 B.骨质增生硬化

佝偻病性手足搐搦在痉挛发作时哪项处理最正确

A．立即静注钙剂

B．立即注射维生素D

C．先镇静再注射钙剂

D．迅速静推甘露醇

E．保持安静待其自然缓解

“世界环境日”是哪一天？（）

A.6月7日

B.6月17日

C.6月5日

D.6月21日

We know that many animals do not stay in one place.Birds,fish and other animals move from one place to another at a certain time.They move for different reasons:most of them move to find food more easily,but others move to get away from places that are too crowded.

When cold weather comes,many birds move to warmer places to find food.Some fishes give birth in warm water and move to cold water to feed.The most famous migration（迁移）is probably the migration of fish,which is called “Salmon”.This fish is born in fresh water but it travels many miles to salt water.There it spends its life.When it is old,it returns to its birthplace in fresh water.Then it gives birth and dies there.In northern Europe,there is a kind of mouse.They leave their mountain homes when they become too crowded.They move down to the low land.Sometimes they move all the way to the seaside,and many of them are killed when they fall into the sea.

Recently,scientists have studied the migration of a kind of lobster（龙虾）.Every year,when the season of bad weather arrives,the lobsters get into a long time and start to walk across the floor of the ocean.Nobody knows why they do this,and nobody knows where they go.

So,sometimes we know why humans and animals move from one place to another,but at other times we don’t.Maybe living things just like to travel.

小题1:Most animals move from one place to another at a certain time to _________.

A．give birth

B．enjoy warmer water

C．find food more easily

D．find beautiful places小题2:The mice in northern Europe move when _________.

A．they give birth

B．the weather is bad

C．the place gets too crowded

D．they haven’t enough food小题3:The lobsters move _________.

A．to the fresh water

B．to the deeper sea

C．at a certain time

D．to find more food

2011年3月5日，十一届全国人大四次会议在京胜利召开。会议听取和审议了政府工作报告和最高人民法院、最高人民检察院工作报告；会议表决通过了关于2010年国民经济和社会发展计划执行情况与2011年国民经济和社会发展计划的决议草案；会议通过了关于国民经济和社会发展的第十二个五年规划纲要的决议及其他报告、决定。

运用人民代表大会制度的知识对材料加以分析说明。

所谓产品的送货是指什么？