容易伪造

人工售票

信息是只读信息

存储信息量大

只充填于长骨的髓腔内

胎儿、幼儿的骨髓均是红骨髓

黄骨髓仍有部分造血机能

黄骨髓永远不能转化为红骨髓

成年后，髂骨、胸骨内的骨髓将转化为黄骨髓

红骨髓无造血功能

黄骨髓不能转换成红骨髓

只位于长骨的骨髓腔内

胎儿和幼儿骨内完全是红骨髓

黄骨髓有造血功能

1.Hooray! It's snowing! It's time to make a snowman.James runs out. He makes a big pile of snow. He puts a big snowball on top. He adds a scarf and a hat. He adds an orange for the nose. He adds coal for the eyes and buttons.In the evening, James opens the door. What does he see? The snowman is moving! James invites him in. The snowman has never been inside a house. He says hello to the cat. He plays with paper towels.A moment later, the snowman takes James's hand and goes out.They go up, up, up into the air! They are flying! What a wonderful night!The next morning, James jumps out of bed. He runs to the door.He wants to thank the snowman. But he's gone

2

3

4

1,2,3,4

2,3,4,1

1,4,2,3

1,2,4,3

黄骨髓有造血功能

青春期长骨干内红骨髓开始转化为黄骨髓

胎儿和幼儿的骨内全部为红骨髓

红骨髓无造血功能

仅充填于骨髓腔内

学习、执行国家法令、规范，为施工测量服务，对施工质量与进度负责

先测设精度较高的场地整体控制网，再以控制网为依据进行各局部建筑物的定线、放线

应坚持测量作业与计算工作步步校核

应选择科学、简单的测量方法，采用精度较高的仪器，力求做到高精度测量

正确

错误