夹有较大砾石的多泥沙河流上的水闸不宜设()。 A.防冲墙 B.护坦 C.消力池 D.

题型:单项选择题

问题:

夹有较大砾石的多泥沙河流上的水闸不宜设()。

A.防冲墙

B.护坦

C.消力池

D.海漫

考点:水利水电工程第六章水工建筑物第六章水工建筑物题库
题型:单项选择题

阅读短文,判断正(T)误(F)。

     I started this QQ group named CZ (Chenzhou) English club two months ago. It has twenty-eight

members now. It is an English chatting place. Now we need some more friends who are interested in

chatting in English. Please remember the rules for our group members.

     ★ Everyone in our group must speak in English with each other. Don't keep silent for ten days.

     ★ The main aim of this group is to improve our English.

     ★ Chatting in English doesn't mean we pay more attention to English. I think Chinese is my first

          language and it's the most important.

     ★ Don't send advertisements or any pictures here. If you don't follow the rules above, we will ask

          you to leave.

( )1. This QQ group is an Engl ish chatting place.                              

( )2. Everyone in this group must speak in Chinese with each other.            

( )3. The main aim of this QQ group is to make friends.                        

( )4. The writer thinks English is more important t han Chinese.               

( )5. If you send advertisements or any pictures  here, you will have to leave.

题型:单项选择题

一个单摆的振动周期是2s,摆长缩为原来的1/4时,周期为____________s,摆球质量减为原来的1/4时,周期为____________s,振幅减为原来的1/4时,周期为____________s。

题型:单项选择题

以下哪些是当前主要流行的DDOS攻击()?

A.IP地址攻击

B.TCP全连接攻击

C.刷Script脚本攻击

D.SYN/ACKFlood攻击

题型:单项选择题

循环论的错误在于只看到

A.事物发展的周期性否认了前进性
B.事物发展的曲折性否认了直线性
C.事物发展的连续性否认了间断性
D.事物发展的普遍性否认了特殊性

题型:单项选择题

税收会计信息资料的电子数据文件必须每月进行一次复制转储,永久保存.

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