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【简答题】
One day an American called Simon went to London to visit his friend, Rick. Rick told him that his flat was on the first floor. When he arrived, Simon went straight to the first floor of the building. But he was told that there was no Rick on that floor. Do you know why? In fact, the British call the first floor of a building the ground floor. The floor above the ground floor is the first floor, which Americans would call the second floor. The story shows that there are a few culture differences between Britain and American, though the British and Americans both speak English. The British usually hide their feelings. They seldom start a conversation with strangers. For example, on the train the British often spend their time reading newspapers or books. But Americans are quite different. They’re more active and easier to talk with. The British and Americans may use different terms for many things. The British usually use football ,eraser and mail while Americans prefer to soccer, rubber and post. 小题1: Simon went to London to         . A. spend his holiday B. visit his friend C. study English 小题2:Which picture shows us where Rick’s flat was? 小题3:According to the passage, the British usually spend their time        on the train. A. playing cards B. talking loudly   C. doing some reading 小题4:What does the underlined word “terms” mean in Chinese in the passage? A. 成果   B.术语 C. 学期 小题5:What’s the main idea of the passage? A. Different culture between Britain and America. B. The British and Americans have the same language. C. The British and Americans have different words.
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【单选题】关于细胞免疫,下列哪项是错误的
A.
T细胞介导,巨噬细胞参与
B.
致敏Tc细胞介导细胞毒作用
C.
由TD抗原引起
D.
CD3传递活化的第一信号
E.
抗原肽-MHC复合物传递活化的第二信号
【单选题】关于细胞免疫,下列哪项是错误的?
A.
T 细胞介导,巨噬细胞参与
B.
致敏Tc细胞介导细胞毒作用
C.
由TCR特异性识别抗原
D.
CD3 传递活化的第一信号
E.
抗原肽—MHc复合物传递活化的第二信号
【单选题】()属于埃及的“国菜”
A.
花生
B.
蚕豆
C.
豆角
D.
白菜
【单选题】关于APC在免疫应答中的作用,下列哪项是错误的?
A.
专职APC呈递抗原肽-MHCII类分子复合物提供第一信号
B.
专职APC上的CM与T细胞的CMR结合产生第二信号
C.
专职APC能分泌CKs,辅助体液免疫应答产生
D.
非专职APC只有处理抗原与呈递抗原能力
E.
B细胞为非专职APC
【单选题】砌筑工程中,砖基础的基础长度计算原则为( )。
A.
外墙和内墙都按中心线计算
B.
外墙和内墙都按净长线计算
C.
外墙按净长线计算,内墙按中心线计算
D.
外墙按中心线计算,内墙按净长线计算
【单选题】下列属于种子的是(  )
A.
豆角
B.
玉米籽粒
C.
苹果
D.
黄豆
【单选题】关于信号肽,下列哪项叙述是错误的( )?
A.
由分泌蛋白分子mRNA分子中的信号密码翻译而来
B.
可以于SRP相互作用而结合
C.
只有合成信号肽的核糖体才能与内质网结合
D.
信号肽所含氨基酸均为亲水性氨基酸
【简答题】砌筑工程墙长外墙按中心线,内墙按( )计算
【单选题】关于信号肽,下列哪项是错误的?( )
A.
由18~-30个氨基酸残基组成
B.
富含一段亲水性氨基酸
C.
可与信号识别颗粒结合
D.
只有合成信号肽的核糖体才能与内质网结合
E.
信号肽具有起始肽链跨膜转移的作用,并消耗GTP所提供的能量
【单选题】单选题:7、豆角的茎属于( )
A.
A直立茎
B.
B攀援茎
C.
C匍匐茎
D.
D缠绕茎
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