问题
单项选择题
关于骨的描述，错误的是
A．通常成年人共有206块骨
B．形态分长．短、扁、不规则骨
C．骨质分骨松质和骨密度两种
D．骨膜含有丰富的血管和神经
E．成人骨髓均具有造血能力
答案
参考答案：E
解析：成人骨髓中的黄骨髓无造血能力。
搜题请搜索小程序“爱下问搜题”
关于骨的描述，错误的是
A．通常成年人共有206块骨
B．形态分长．短、扁、不规则骨
C．骨质分骨松质和骨密度两种
D．骨膜含有丰富的血管和神经
E．成人骨髓均具有造血能力
参考答案：E
解析：成人骨髓中的黄骨髓无造血能力。
Dear Mom and Dad, I will go to Alice’s home with her after school, and I will have supper and sleep there. Don’t 21 about me. You know that Alice is one of my 22 friends. If you want to talk with me, you can 23 68610598 after 6:00 pm. Please forgive me for not telling you first. I don’t think you will 24 me to do so if I tell you first. 25 I think teenagers should be allowed to stay at their friends’ houses sometimes. I am sixteen years old and I’m not a little kid 26 . I hope I can make decisions for 27 . At home, there are too many 28 for me to obey: Don’t stay out so 29 ; don’t have meals before 30 hands; don’t watch TV without finishing homework, etc. Parents should be 31 teenagers, but we need freedom, too. I don’t like doing my homework 32 at home. I’d love to study 33 Alice. We can learn a lot from each other. 34 please allow me to stay at Alice’s house once a week. If you 35 , Alice can stay at our house with me, too. Yours, Lillian
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