问题 单项选择题

下列关于神经调节的叙述,错误的是().

A.在刺激丰富的环境中生长的正常孩子神经突起及突触数量将会增多

B.当神经纤维的某一部分受到刺激产生兴奋时,膜内为正电位,膜外为负电位,电流在膜内由兴奋部位流向未兴奋部位,在膜外由未兴奋部位流向兴奋部位

C.兴奋只能以局部电流的形式在多个神经元之间单向传递

D.传出神经元的轴突上某一点受到刺激,兴奋会向轴突两端进行传导

答案

参考答案:C

解析:

兴奋在神经元的神经纤维上的传导是以局部电流的形式进行的,而在神经元之间的传递是通过突触前膜释放的递质来传递的,这是一种化学信号,突触后神经元将化学信号转化为电信号,这种兴奋在神经元之间的传递是单向的,但是传递的形式是化学信号与局部电流相结合的,因此C项“兴奋只能以局部电流的形式在多个神经元之间单向传递”是错误的。

选择题
阅读理解

The booking notes of the play “the Age of Innocence”:

Price: $10

BOOKING : There are four easy ways to book seats for performance:

★in person

The Box Office is open Monday to Saturday, 10 a. m. -8 p. m.

★by telephone

Ring 01324976 to reserve your tickets or to pay by credit card(Visa, MasterCard and Amex accepted)

★by post

Simply complete the booking form and return it to Global Theatre Box Office.

★on line

Complete the on-line booking form at www. Satanfied theatre.com

DISCOUNTS:

Saver: $2 off any seat booked any time in advance for performances from Monday to Thursday. Savers are available for children up to 16 years old, and full-time students.

Supersaver: half-price seats are available for people with disabilities and one companion. It is advisable to book in advance. There is a maximum of eight wheelchair spaces available and one wheelchair space will be held until an hour before the show.

Standby: best available seats are on sale for $6 from one hour before the performance for people eligible(suitable)for Saver and Supersaver discounts and thirty minutes before for all other customers.

Group Bookings: there is a ten per cent discount for parties of twelve or more.

School: school parties of ten or more can book $6 standby tickets in advance and will get every tenth ticket free.

Please note: we are unable to exchange tickets or refund money unless a performance is cancelled due to unforeseen circumstances.

小题1:If you want to book a ticket, you CANNOT _____

A.go to the Box Office on Sundays.

B.ring the booking number and pay for the tickets by credit card.

C.use the Internet.

D.complete a booking form and post it to the Box Office.小题2:According to the notes, who can get $2 off?

A.The people who book the tickets on Fridays.

B.An 18-year-old teenager.

C.A 55-year-old woman.

D.A 20-year-old full-time college student.小题3:If you make a group booking for a group of 14 adults, how much should you pay?

A.$120

B.$126

C.$140

D.$150