According to the passage，what happens to homing pigeons when they are about a month old？
A.They are kept in a trap．
B.They enter their first race．
C.They begin a training program．
D.They get their wings clipped and marked．
凌出：
A．解雇
B．自然减员
C．调换岗位
D．缩短工作周
E．提前退休
It was remarkable of man to invent the wheel because _______．
A.it led to many other inventions
B.man had no use for it then
C.there were no wheels in nature
D.all of the above
要求：
A．写成议论文；
B．字数，800～1200字；
C．字迹工整，卷面整洁。
（本小题满分13分）
已知函数？（x）=x3-3x2+m在区间[-2，2]上有最大值5，试确定常数m，并求这个函数在该
闭区间上的最小值．
美国独立战争爆发于（）
A.1774年
B.1775年
C.1776年
D.1777年
A．高级语言较低级语言更接近人们的自然语言
B．高级语言、低级语言都是与计算机同时诞生的
C．机器语言和汇编语言都属于低级语言
D．BASIC语言、PASCAL，语言、C语言都属于高级语言
His business is growing so fast that he must____ more workers.
A.take up
B.take on
C.take over
D.take out
A．组织的规模
B．政策的统一性
C．培训管理人员的需要
D．活动的分散性
已知一个等差数列的第5项等于10，前3项的和等于3，那么这个等差数列的公差为（）
A.3
B.1
C.-1
D.-3
根据内容回答下列各题，For some minutes, all was quiet in the street. Then from across the street someone came walking. It looked like a man of middle height, dressed in a big raincoat, a soft hat and rubber-soled boots or shoes, and making little sound while walking. No one was in sight. It was a street with two rows of about fifty small houses and there were three lamps on either side. The lamp nearest to the child’s house could be seen clearly, but the others were almost hidden by the smoky air. A car passed the end of the street and its lights showed faintly, but clearly enough to show the smooth skin of a woman’s face. The car disappeared as the woman, wrapped up in her coat, reached the doorway of the child’s house. She put a key in the lock quickly, pushed the door open and stepped inside, then closed the door without looking round．She began to breathe hard. She leaned against the door for a moment, then straightened up as if with an effort, and walked towards the door of the front room, the passage leading to the kitchen, and the narrow staircase. She hesitated outside the door, then went up the stairs quickly but with hardly a soun D．There was enough light from the narrow hall to show the four doors leading off a small landing （楼梯平台). She pushed each door open in turn and shone a torch inside, and the light fell upon beds, walls, furniture, a bathroom hand-basin, a mirror which flashed brightness back; but this was not what the woman was looking for. She turned away and went downstairs, and hesitated again at the foot of the stairs, then turned towards the kitchen. Clearly there was nothing there, or in the small washroom that she wante D．Two rooms remained; the front room and a smaller one next to it. She opened the front room door. After a moment, she saw the child’s bed and the child. The lights of the car passing the end of the street showed that .
A.a woman was driving the car
B.someone was standing by a street lamp
C.a man and a woman were walking up the street
D.a woman was walking by herself up the street
直线2x+5y-6=0关于y轴对称的直线方程是（）
A.2x-5y+6—0
B.2x-5y-6=0
C.5x+2y-6=0
D.2x+5y+6=0
直线Y=ax+2与直线Y=3x－b关于直线y=x对称，则
A．企业战略转换
B．企业技术创新
C．企业流程再造
D．企业管理创新