纤维光导喉镜杆的外径相当于（）
A.F20号纤维光导喉镜杆的外径，能顺利通过内径F28号气管导管
B.F22号纤维光导喉镜杆的外径，能顺利通过内径F30号气管导管
C.F24号纤维光导喉镜杆的外径，能顺利通过内径F32号气管导管
D.F26号纤维光导喉镜杆的外径，能顺利通过内径F34号气管导管
E.F28号纤维光导喉镜杆的外径，能顺利通过内径F36号气管导管
参考答案：D
When I was young， my father used to grow carnations (康乃馨).His carnations were red， pink and white. Everyone who saw them admired them for their beauty. He took care of them with so much love and 36 . Every day he came home from work， he went straight to see them. He 37 watching them every day. We the kids did too. But he used to tell us， “No one should touch my flowers.” One day my younger sister， who loved my dad very much， had wanted to help him and she 38 the carnations from their stems (枝干) one by one and arranged them 39 . She believed that he would be very 40 to see them that way. When mom and I realized what my sister had done， we became completely hopeless. However， my sister had no idea why no one showed her any appreciation. When my dad arrived he went， 41 ， straight  to see the flowers. When he saw his flowers lying on the floor like dead animals， he was 42 at first. He looked towards the street， to see if it was any of the 43 children who could have done it. Then he entered the living room and looked at mom in silence.Finally mom， who always taught us to 44 no matter what， looked at dad and said： “We have no bad neighbors in our area”. Then with a nice tone she continued： “No outsider did this great job， only your lovely daughter Clémence.” My dad’s face changed into 45 and then he said： “Do I have a better 46 than my lovely daughter？” My younger sister smiled and 47 dad tightly.
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