放射治疗机有哪些种类?

如再次使用同批号青霉素注射时，免做过敏试验要求间断时间不超过（）

A.1天

B.3天

C.5天

D.7天

E.14天

继承法中规定的法定继承人包括（）

A．孙子孙女

B．非婚生子女

C．外甥侄女

D．兄弟姐妹

简述双脱氧链终止法测定DNA碱基序列的原理。根据下列图谱给出被测定链的基因序列和方向。

Sometimes I really doubt whether there is love between my parents. Every day they are very busy trying to __36__ in order to pay the high tuition for my brother and me. They don’t act in the __37__ ways that I read in books or I see on TV. In their opinion, “I love you” is too __38__ for them to say. Sending flowers to each other on Valentine’s Day is even more out of __39__.

One day, my mother was sewing a quilt. I sat down beside her. “Mom, I have a question to ask you. Is there __40__ between you and Dad?” I asked her in a very low voice. She didn’t answer immediately. She __41__ her head and continued to sew the quilt.

I was very worried because I thought I had _42_ her. I was _43__ and I didn’t know what I should do. But at last I heard my mother say the following words:

“Susan,” she said thoughtfully, “Look at this thread．Sometimes it __44_, but most of it disappears in the quilt. The thread really makes the quilt __45__. If life is a quilt, then love should be a thread．It can hardly be seen __46_, but it’s really there. Love is __47__.”

I listened carefully but I __48__ her until the next spring. At that time, my father suddenly __49_ seriously. My mother had to stay with him in the hospital for a month. When they returned from the hospital, they both looked __50 _. It seemed both of them had had a serious illness. After they were back, every day in the morning and dusk, my mother helped my father __51__ on the country road．

“Dad, how are you feeling now?” I asked him one day.“Susan, don’t __52__ me.” he said gently. “To tell you the truth, I just like walking with your mom.”__53__ his eyes, I know he loves my mother deeply.

Once I thought love meant flowers, gifts and __54__. But from this experience, I understand that love is just __55__ in the quilt of our life. Love is inside, making life strong and warm.

31．A．keep fit              B．rise early                    C．earn money         D．collect fortune

32．A．magic                B．romantic                    C．fantastic                 D．attractive

33．A．simple                B．easy                          C．relaxing                 D．luxurious

34．A．the question        B．question                    C．reach                     D．control

35．A．feeling               B．love                          C．quarrel                   D．smile

36．A．raised                 B．shook                        C．nodded                  D．bowed

37．A．hurt                   B．injured                      C．wounded                D．harmed

38．A．in great surprise                                         B．in a great embarrassment

C．with deep depression                                  D．at extreme sorrow

39．A．happens              B．comes about               C．appears                  D．occurs

40．A．warm and soft     B．hot and hard              C．thin and cool      D．strong and durable

41．A．somewhere and sometime                           B．anywhere or anytime

C．more or less                                              D．here and there

42．A．inside                 B．outside                      C．faraway                D．nearby

43．A．could believe    B．couldn’t understand  C．wouldn’t recognize   D．might know

44．A．got sick              B．got stuck                   C．threw up                 D．became disabled

45．A．quite healthy       B．very pale                   C．fairly red                D．much surprised

46．A．jump high          B．go hurriedly               C．run fast                  D．walk slowly

47．A．think about         B．talk with                    C．worry about        D．laugh at

48．A．Reading             B．Seeing                       C．Saying                   D．Writing

49．A．fresh roses        B．gold ring                 C．sweet kisses        D．beautiful jewelry

50．A．a thread        B．a needle              C．the cloth         D．the cotton

洋地黄中毒时，以下治疗错误的是（）

A.立即停用洋地黄类药，严密心电监测

B.对快速性心律失常，血钾浓度低者，静脉补钾，血钾不低可使用利多卡因或苯妥英钠

C.有传导阻滞及缓慢性心律失常者可用阿托品

D.电复律常规应用