皮皮学,免费搜题
登录
搜题
【单选题】
粗糙的直管内流体流动进入完全湍流区时,其摩擦系数
A.
与光滑管一样
B.
只与雷诺数有关
C.
只与相对粗糙度有关
D.
与雷诺数和相对粗糙度都有关
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【单选题】在接收机中,克服信号衰落现象的电路是_____。
A.
输入保护电路
B.
AGC电路
C.
解调前设置限幅器
D.
静噪电路
【单选题】在接收机中,克服衰落现象的电路是_____。
A.
输入保护电路
B.
AGC电路
C.
解调前设置限幅器
D.
静噪电路
【简答题】Identify personality factors that may contribute to the SUCCESS of learning a second/foreign language.
【单选题】After China launched a______to popularize Chinese, lots of Confucius colleges have appeared in foreign universities.(青岛市)
A.
campaign
B.
movement
C.
measure
D.
struggle
【单选题】With Shanghai World Expo drawing near, volunteers are making use of every minute to ____ their foreign language because language volunteers must pass a written test and an interview.
A.
polish up
B.
take up
C.
use up
D.
make up
【单选题】The students gave a quick answer to the question ________they did it,________was raised by the foreign visitors.
A.
which;which
B.
why;which
C.
why;that
D.
that;that
【单选题】The ______ is the agency taking the responsibility of inspecting and supervising the foreign exchange business of financial institutions.
A.
The SAFE
B.
The PBC
C.
The IMF
D.
The State Council
【单选题】听力原文: India and Pakistan have agreed to set up a telephone hotline between their foreign ministries to reduce the risk of nuclear war. An Indian Foreign Ministry spokesman says the two countries will ...
A.
To improve telecommunications.
B.
To avoid misunderstanding.
C.
To warn of military clashes.
D.
To prevent nuclear confrontation.
【判断题】采用数字积分法插补直线和圆弧时,每一个脉冲只能走一个步距 单位 ,或者 X,或者是 Y
A.
正确
B.
错误
【单选题】在接收机中,克服衰落现象的电路是()。
A.
输入保护电路
B.
设置AGC电路
C.
解调前设置限幅器
D.
静噪电路
相关题目: