题目

以下有关神经兴奋的叙述中，正确的是（ ） A．静息状态时神经元细胞膜内外没有离子进出B．神经递质与突触后膜上受体的结合有特异性C．静息状态下神经细胞膜两侧电位表现为内正外负D．神经递质经胞吞过程穿过突触前膜进入突触间隙 答案：B 第二节  完形填空(共20小题;每小题1.5分，满分30分) 阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。 Every time I passed boys who were playing basketball，I stopped to silently watch them．I really envied them．But as a girl，I once thought that I could   36   play basketball．     I like playing basketball though I'm not good at it. I’ve had a basketball   37   I was a child．At first，I could play freely because no one   38   when I was just a kid．But as I grew up it seemed harder and harder for me to enjoy basketball．     At school，it was always the boys who played basketball during PE classes．The girls were   39   allowed to play volleyball or badminton．     My parents did not   40   me play basketball at home．“Basketball is not fit for girls，”they said．  41  I went to play basketball with my friends，boys   42   at me on the court as if I were an alien．      I was feeling   43   and had lost hope of playing basketball． 44  ，something changed the first day of high school． I made some friends who also enjoyed playing basketball．They  45   me to get back on the court．     One of them told me with a smile.“Go your own   46  ，let others talk．”This girl would always play basketball with me．Even the boy who sat next to me in class talked about   47  with me almost every day．     I was inspired by them．Confidence and passion   48   to my heart．I am ready to stand up and play．I will play as well as I can， 49   for me，even the sky is boundless(无垠的)．     Basketball has become an important part of my  50  ．I am interested in it．I watch matches and enjoy playing almost every day．Through basketball，not only do I feel happy and confident，but also  51   a lot． I’ve heard the NBA star Tracy McGrady say，“Nothing is impossible．”It is from an advertisement on TV．I have  52   to realize that life is just like playing basketball．You should have an  53  ．After that，just be confident and  54   going．Never give up and you’ll make it sooner or later．     I love the motto of the NBA.  It can  55  my strong feelings for basketball，“I love this game!” 36．A．ever                       B．often                     C．never                    D．always 37．A．when                     B．before            C．after                      D．since 38．A．struggled                B．cared                     C．enjoyed                   D．joined 39．A．only                      B．almost            C．hardly                     D．not 40．A．encourage              B．agree                     C．let                          D．permit 41．A．Still                       B．Yet                       C．Just                        D．Even 42．A．1ooking                 B．glaring                  C．glancing                  D．staring 43. A. up                         B. down             C. excited           D. satisfied 44. A. Unluckily                B. Naturally             C. Unexpectedly          D. Clearly 45. A. encouraged              B. forbade                  C. ensured               D. explored 46. A. effort                  B. way                  C. business               D. direction 47. A. basketball              B. sports                 C. interests               D. dreams 48. A. stuck                   B. referred              C. turned                D. returned 49. A. but                    B. though               C. and                   D. however 50. A. wish                   B. life                   C. work                  D. study 51. A. experience             B. grow                    C. learn                 D. play 52. A. come              B. turned             C. refused              D. happened 53. A. idea               B. aim                      C. opinion               D. effort 54. A. insist              B. remain                   C. keep                  D. last 55. A. inform                      B. express          C. ignore                  D. connect