搜题请搜索小程序“爱下问搜题”
问题 选择题

声波形成到听觉形成需经过

①听小骨 ②鼓膜 ③耳蜗内的听觉感受器 ④外耳道 ⑤大脑皮层的听觉中枢 [ ]

A．声波→①→②→③→④→⑤

B．声波→④→②→①→③→⑤

C．声波→④→①→②→③→⑤

D．声波→④→③→①→②→⑤

答案

答案：B

完形填空
阅读下面对话，掌握其大意，并根据所给首字母的提示，在标有题号的右边横线上写出一个英语单词的完整、正确形式，使对话通顺。
W：Hello, Jim. Where are you going?
M：To the cinema. What about  (76) c_______ with me?
W：No, thanks. I’m going home. My friend’s expecting me.
M：What a (77) p_____！ I believe it’s a very good film.
W：Do you go to the cinema a lot?
M：(78) O___ a week. Most nights I sit at home and watch TV.
W：Oh, I see. (79) B__ the way, where are you going for your holidays this year?
M：I don’t know yet. My wife’s going to her mother’s for a
(80) c_____ of weeks. She lives by the sea, you know.
W：Oh, does she? That’s convenient.
M：Yes, but I want to go to the (81) c________.
W：Don’t you like the sea?
M：Yes, very much. But I need (82) p_____ and quiet when I’m on holiday. What are you going to do?
W：I’m going to (83) s_____  at home.
M：Aren’t you going to (84) h____ a holiday abroad this year?
W：No, I want to buy a car, and that’s going to take
(85) e_______ penny I’ve got.
 
小题1:________
小题2:_______
小题3:________
小题4:________
小题5:_______
小题6:_______
小题7:________
小题8:________
小题9:_______
小题10:_______
查看答案
选择题

用波长为λ1和λ2的单色光1和2分别照射金属1和2的表面.色光1照射金属1和2的表面时都有光电子射出，色光2照射金属1时有光电子射出，照射金属2时没有光电子射出.设金属1和2的逸出功为W1和W2，则有

A．λ1>λ2,W1>W2

B．λ1>λ2,W1<W2

C．λ1<λ2,W1>W2

D．λ1<λ2,W1<W2
查看答案