图1为某山区等高线地形图（单位：米），已知该地多岩崩和泥石流等地质灾害，读图回答问题

已知：y是x一次函数，且当x=2时，y=-3；且当x=-2时，y=1

（1）试求y与x之间的函数关系式并画出图象；

（2）在图象上标出与x轴、y轴的交点坐标；

（3）当x取何值时，y=5？

目前，在办公室里使用的三类传真机大多采用( )

A．喷墨记录方式

B．照相记录方式

C．静电记录方式

D．感热记录方式

某工地水泥从两个地方采购，其采购量及有关费用见下表，则该工地水泥的基价为( )元/t。 采购处 采购量/t 供应价格/(元/t) 运杂费/(元/t) 运输损耗率(%) 采购及保管费费率(%) 来源一 300 240 20 0.5 3 来源二 200 250 15 0.4

A．244.0
B．262.0
C．271.1
D．271.6

常见纵隔淋巴结肿大的急性白血病类型是（）

A.B淋巴细胞性

B.T淋巴细胞性

C.粒细胞性

D.单核细胞性

E.巨核细胞性

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