题干

如图为反射弧曲部示意图,刺激C点检测各位点的电位变化,下列分析错误的是(  )

A:若检测到b,d点有电位变化,说明兴奋在同一神经元上是双向传导的

B:兴奋由c点传导到e点时,发生电信号→化学信号→电信号的转换

C:a点检测不到电位变化,是由于突触前膜释放的是抑制性递质

D:电表①不偏转,电表②偏转两次

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答案(点此获取答案解析)

C

同类题1

配对阅读。左栏是五个人物想要做的事。右栏是七个节目、地方和服务的简介。请为每个人选择最合适的节目、地方或服务。

 ____ Mrs. Smith wants to send her daughter to take some piano lessons during the coming summer holiday.

____ Sam and his girl friend want to spend the weekend to watch something new. They both like dancing.

____ Dannel wants to buy some newspaper to read so that he can improve his English. 

____ Miss Black wants to come to Beijing for the first time in August. She wants to enjoy the real Beijing Opera very much.

____ Tony and his colleagues will have a trip in Guangzhou next week. They need to rent a car and a driver who understands English. 

A.Watch Your Neck

This modern ballet is telling the story of “Dracula” which is the classic novel by Irish playwright Bram Stoker.

Time: 8:30 pm

February 2~9    Tel: 98558588

B.Children's Activity Center

Tel: 66589982

    Add: No.2 Zhongshan Road. (Singing lessons, piano lessons and dancing lessons. )

C.Art Show

A total of 10 artists living close to each other are jointly giving an art exhibition.

D.Peking Opera
Mei Lanfang's brave fighting against the Japanese during the war of Resistance against Japanese will open your mind.

E.Foreign Book Center

More and more increasing learning English books and newspapers, CDs. etc.

F.The Changcheng Hotel

Five star hotel. Looking for much experienced receptionists. Tel: (010)55883326 

G.Car-Hire Service

12 seat Forit transit van for hire in Zhujiang Business and Private Hire. We have English-speaking drivers.