楔形缺损不发于 A．切牙唇面颈部 B．前磨牙颊面颈部 C．磨牙颊舌面颈部 D．青少年

劳动时人体主要的产热器官是（）

A.皮肤

B.心脏

C.肝脏

D.骨骼肌

E.肾脏

"A child is dying---out of breath!" I had just begun my working day in the city, when these words came through the radio of the police car I was driving. I turned on the red lights and siren(警笛)and drove off as fast as I could. "Just my luck!" I thought. I didn't know this city well and my first call of the day was a life-and-death sudden happening, several kilometers away.

I got to the house. A mother, filled with fear, handed me her baby, his face already blue. Was I too late? Dear me!

I did what had been taught to do in such a serious condition. A small thing flew out of the baby's mouth on to the floor. It was a button. Thank heaven! The holes in it let a little air through.

A doctor rushed into the room. He had with him an oxygen bag.

The child began to cry at the top of his voice, burned red and started to look for his mother. He was angry but was saved.

小题1:The writer of the story is _______.

A．a policeman

B．a driver

C．a doctor

D．the boy's father小题2:The writer turned on the red lights and siren in order to _____.

A．show that he was a police car

B．have the people in the streets make way for him

C．warn the people in the streets of the danger ahead

D．tell the people in the streets that he did not know the way well小题3:The baby was still living when the writer got to the house because _______.

A．the writer arrived in time

B．the writer had been taught what to do at that time

C．the button was not big enough

D．the button happened to have holes in it小题4:What worried the writer all the way to the dying child ?

A．He was afraid to come too late to save the child.

B．It was a sudden happening and he was too young.

C．Any people might be knocked down or killed by his car.

D．He was afraid that he could not have the button taken out.

读下图，据此回答1～3题。

小题1:根据图中岛屿的地理位置和山脉走向分析，降水最多的城市是

A．①

B．②

C．③

D．④小题2:如果计划在①城市建一个水泥厂从保护城市大气环境考虑，厂址的最佳位置是位于城市的

A．西南郊

B．东南郊

C．东北郊

D．西北郊小题3:该岛屿适宜种植的经济作物是

A．甘蔗

B．水稻

C．棉花

D．甜菜

读某水电站的蓄水大坝纵向剖面图，回答下列问题。

（1）建坝主要应考虑大坝___________侧的气候、水文等历史资料。

（2）可以明显改善航运条件的是大坝以_______区域，__________侧的区域有防洪、灌溉的作用。

（3）由于拦坝蓄水，大坝以________的低洼地区可能需搬迁居民，建坝后，泥沙容易淤积的区域是_______________。

（4）  图上可利用的水位落差是__________，水能突出的优点是________________。

（5）  关于田纳西河水系的特点的叙述，正确的是[ ]

A．田纳西河水系发达，水量丰富，全部可以通航

B．田纳西河地形起伏大，河流落差大，因此通航里程短

C．田纳西河地形起伏大，河流落差大，因此水力资源丰富

D．田纳西河受亚热带气候影响，水量十分稳定

（6）  田纳西河干流上的水库开始放水的时间是[ ]

A．每年的8月1日

B．每年的3月1日

C．每年的12月24日

D．每年的1月1日

（7）三峡工程建设引发的生态环境问题及其防治对策组合不正确的是[ ]

A．水土流失—调整农业结构、发展大农业

B．泥沙淤积—蓄清排浑、航道疏浚

C．水库地震—慎重选址、抗震设计

D．淹没耕地—垦耕荒地、壁山造地

体内缺铁时，最早表现是（）

A.血清铁降低

B.血清总铁结合力增高

C.储存铁减少

D.MCV变小

E.MCH减低