以下关于OSPF协议的描述中,错误的是______。 A.OSPF使用分布式链路状态

题型:单项选择题

问题:

以下关于OSPF协议的描述中,错误的是______。

A.OSPF使用分布式链路状态协议
B.链路状态“度量”主要是指费用、距离、延时、带宽等
C.当链路状态发生变化时用洪泛法向所有路由器发送信息
D.链路状态数据库只保存下一跳路由器的数据

考点:计算机等级考试网络技术三级网络技术机试
题型:单项选择题

1999年所有高收入家庭平均寿险支出2065元,财险支出1185元。高收入家庭子女教育年人均消费 11301元。其中生活费用支出为4183元,学习费用支出为3193元,择校费用支出为3925元。在国有学校就学的比例占89.1%,在国外学校就学的比例占3.4%,在国内民办(私立)学校就学的比例占 7.5%。

择校费用支出占子女教育费用支出的比例为多大()

A.35%

B.37%

C.41%

D.33%

题型:单项选择题
Read and write. (写出下列动词的现在分词形式)
1. watch    _                    
2. take   _  
3. catch   _                     
4. pick   __  
5. have    _                    
6. fish   _  
7. bite                                                                                      
8. eat    _  
题型:单项选择题
根据对话内容,从下面方框中选择适当的单词或词组填空,使对话内容完整正确。
Good luck,  makes,  trouble,  improve myself,  all the time  
A: Though you guys are busy, could you just lend me an ear for a moment?
B: Something wrong? You are not yourself today. I observe(观察) you    1 , you know.
A: I’ve been getting into    2  because I don’t know how to focus on my study as a Grade 9 student. And I really wish for tips from you because you have set a good example for me.
B: To tell you the truth, I really experienced a hard time like you. However, I could face problems confidently. That    3  a big difference.
A: Can you tell me how to adjust(调整) my habit of learning and    4  a lot?
B: I’m afraid you’d better change your way of listening in class. I mean that you not only look at the blackboard while listening carefully but also follow the teacher and speak if possible. Listening, thinking and speaking can work together to improve yourself greatly.
A: It makes sense. I will try and won’t just listen lazily. Thanks a lot.
B:   5  with your new way of learning.
题型:单项选择题
某学校操场外一幢高楼离跑道起点170m,同学们在跑步训练时,由于回声导致发令员先后听到两次发令枪声.若声音在空气中的速度为340m/s,那么听到两次发令枪声的时间间隔约为(  )

A.0.5s

B.1s

C.30s

D.60s

题型:单项选择题

通过肱骨结节间沟的是以下哪条肌腱:()

A.肱三头肌的外侧头肌腱

B.肱二头肌短头腱

C.肱二头肌长头腱

D.冈上肌肌腱

E.冈下肌肌腱

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