据图回答下列问题：症肌无力是自身免疫病，多数患者的免疫系统误将自身肌肉细胞膜（突触后

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问题：

据图回答下列问题：

症肌无力是自身免疫病，多数患者的免疫系统误将自身肌肉细胞膜（突触后膜）上的神经递质受体当作（），产生的自身抗体攻击了此类神经递质受体，从而神经冲动传递受阻，肌肉收缩无力。图3中免疫细胞C2的名称为（）。抗体的化学本质是（）。

考点：高中生物植物激素调节植物激素调节题库
题型：填空题 案例分析题

多年生木本植物的茎能不断增粗，这是因为（　　）

A．茎的维管束内有形成层

B．茎的维管束内有木质部

C．茎的维管束内无形成层

D．茎的维管束内有韧皮部
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(2013·高考山东卷)I used to be a very self­centered person，but in the past two years I have really changed.I have started to think about other people ____ I think about myself.I am happy that I am becoming a ____ person.
I think my ____ started when I was at Palomar College.At first，I just wanted to get my ___ and be left alone.I thought I was smarter than everyone else，so I hardly ever ___ to anyone in my classes.By the end of my first semester，I was really ____.It seemed as if everyone but me had made friends and was having fun.So I tried a(n)____.I started asking people around me how they were doing，and if they were having trouble I ____ to help.That was really a big ____ for me.By the end of the year，I had several new friends，and two of ____ are still my best friends today.
A bigger cause of my new ____，however，came when I took a part­time job at Vista Nursing Home.One old lady there who had Alzheimer’s disease became my ____.Every time I came into her room，she was so ____ because she thought I was her daughter.Her real daughter never ____ her，so I took her place.She let me ____that making others feel good made me feel good too，when she died，I was ____，but I was also very grateful to her.
I think I am a much ____ person today than I used to be，and I hope I will not ____ these experiences.They have ____ me to care about other people more than about myself.I ____ who I am today，and I could not say that a few years ago.
小题1:
A．sinceB．before
C．orD．unless
小题2:
A．famousB．simple
C．differentD．skilled
小题3:
A．educationB．career
C．tourD．change
小题4:
A．balanceB．homework
C．degreeD．interest
小题5:
A．talkedB．wrote
C．liedD．reported
小题6:
A．carefulB．lonely
C．curiousD．guilty
小题7:
A．argumentB．game
C．experimentD．defence
小题8:
A．daredB．offered
C．hesitatedD．happened
小题9:
A．dreamB．problem
C．dutyD．step
小题10:
A．usB．which
C．themD．whom
小题11:
A．attitudeB．hobby
C．hopeD．luck
小题12:
A．friendB．partner
C．guideD．guest
小题13:
A．politeB．happy
C．strangeD．confident
小题14:
A．botheredB．answered
C．visitedD．trusted
小题15:
A．explainB．guess
C．declareD．see
小题16:
A．homelessB．heartbroken
C．bad­temperedD．hopeless
小题17:
A．quieterB．busier
C．betterD．richer
小题18:
A．forgetB．face
C．improveD．analyze
小题19:
A．forcedB．preferred
C．orderedD．taught
小题20:
A．missB．like
C．wonderD．expect
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感染过程表现的５种结局中最易识别的表现是______，最常见的是______。
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题型：填空题 案例分析题

简述根瘤菌固氮特点。
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题型：填空题 案例分析题

下面四部作品，哪一部与其余三部处于不同时代创作而成？（）

A.金槐和歌集

B.新古今和歌集

C.千載和歌集

D.古今著聞集
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