水平界面情况下,一次反射波和多次反射波叠加效应是怎样的?
参考答案:
一次反射波效应增强,多次反射波叠加效应减弱。
根据首字母和英文解释写出单词或词组
1. s____________ ( a carved or painted board; a mark having an accepted meaning)
2. d___________ ( illness)
3. s___________ ( to find a solution)
4. c___________ ( make clean)
5. c___________ ( to express feelings of pain. or dissatisfaction)
6.e__________ ( set up)
7. t___________ up (come up with)
8.c___________ (teach or train sb. esp. for a sports contest)
9.S___________ (looking like sb./sth. , but not the same)
「大学祭」的正确读音是()。
A、だいさい
B、がくさい
C、だいがくさい
D、だくさい