主张“教育即生活、教育是经验的改组和改造、在做中学”的教育家是( )A．布鲁纳 B

在人体细胞中，由A、G、U三种碱基可构成多少种核苷酸[ ]

A．5种

B．4种

C．3种

D．6种

有机物A可以通过不同化学反应分别制得B、C和D三种物质，构简式如图所示．

（1）B中的含氧官能团名称是______．

（2）A→C的反应类型是______；A～D中互为同分异构体的是______．

（3）由A生成B的化学方程式是______．

（4）C在一定条件下发生加聚反应的化学方程式是______．

The house was quiet at 5 a.m. and Tim’s mother was asleep. Only the sound of the big freezer broke the quiet. He’d dreamt of the cave last night. The purring (轻微颤动声) of the freezer had been the sea.

Tim pulled on a sweater and put some apples into his schoolbag. It was too early for breakfast. He’d eat after he’d been through the cave, sitting on the rocks and staring at the sea.

He wished he had a proper pack. His schoolbag would have to do. What else? Sandwiches ---but his mother might wake up if he started pulling out bread for sandwiches, she’d want to know why he had to leave so early. He settled for some biscuits, and left a note stuck to the table.

Gone to Michael’s Back tonight .Tim.

The sky was high and soft and light outside, though the sun still wasn’t up. Even the highway up the hill was quiet as he made his way down the street. The wind from the sea was fresh and sweet.

The sandhills still breathed heat from yesterday’s sun, though the top of the sand was cool. He ran down to the beach impatiently, but there was no one, just dry sand dancing in the early wind and seabirds marching up and down watching the waves.

The light changed suddenly. The first rays of sunlight stretched across the sea. The sun was pushing its way over the edge of the world．

Over the first rocks, along to the point, Tim glanced back. The beach was still empty. The sun sailed higher in the sky.

He could see the cave now, even darker in the morning light. The sand turned silver then dark gold as the water flowed away from it. He had to force himself to go closer. Why was it so much more mysterious now? But it would be silly to go back now after so much trouble. He needn’t go in all the way …

小题1:What did Tim do at the beginning of the story?

A．He left the house quietly

B．He had breakfast at home.

C．He left a note on the freezer.

D．He put a sweater in his schoolbag.小题2:"He settled for some biscuits” ( in Paragraph 3 ) means that Tim_______.

A．left home looking for some biscuits

B．felt like eating biscuits rather than sandwiches

C．had to take biscuits instead of sandwiches

D．could only find some biscuits in the kitchen小题3:What made it possible for Tim to see the entry to the cave?

A．The height of the first rocks

B．The ups and downs of the waves

C．The change in the position of the sun

D．The vast stretch of the sunlit beach小题4:Which of the following statements is TRUE according to the story?

A．The sea looked like a piece of gold.

B．Seabirds flew away when Tim arrived.

C．Tim was the only person on the beach.

D．The sky got dark as Tim reached the cave.小题5:In the story, Tim’s mood changed from        .

A．loneliness to craziness

B．anxiousness to excitement

C．helplessness to happiness

D．eagerness to nervousness

有如下运动队和运动会两个方面的实体：
运动队方面
运动队：队名、教练姓名、队员姓名
队员：队名、队员姓名、性别、项名
其中，一个运动队有多个队员，一个队员仅属于一个运动队，一个队一般有一个教练。
运动会方面
运动队：队编号、队名、教练姓名
项目：项目名、参加运动队编号、队员姓名、性别、比赛场地
其中，一个项目可由多个队参加，一个运动员可参加多个项目，一个项目一个比赛场地。
请完成如下设计：
①分别设计运动队和运动会两个局部E-R图
②将它们合并为一个全局E-R图
③合并时存在什么冲突，你是如何解决这些冲突的？

提金网点可办理（）业务。

A.实时提取出售

B.待提取出售

C.待提取提取

D.回购