问题
单项选择题
裸露病毒体的结构中不包括
A．DNA
B．RNA
C．核衣壳
D．衣壳
E．包膜
答案
参考答案：E
解析：[解题思路] 裸露病毒体的基本结构包括核心和衣壳，共同组成核衣壳。其中核心含DNA或 RNA，衣壳由壳粒亚单位组成，化学成分为蛋白质。包膜病毒体在核衣壳外还有类脂组成的包膜，包膜上有糖蛋白刺突。
[命题规律] 考察“病毒的结构”。重点掌握。
搜题请搜索小程序“爱下问搜题”
裸露病毒体的结构中不包括
A．DNA
B．RNA
C．核衣壳
D．衣壳
E．包膜
参考答案：E
解析：[解题思路] 裸露病毒体的基本结构包括核心和衣壳，共同组成核衣壳。其中核心含DNA或 RNA，衣壳由壳粒亚单位组成，化学成分为蛋白质。包膜病毒体在核衣壳外还有类脂组成的包膜，包膜上有糖蛋白刺突。
[命题规律] 考察“病毒的结构”。重点掌握。
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| A passenger told an air hostess that he needed a cup of water to take his medicine when the plane just took off.She told him that she would__1__the water in ten minutes. Thirty minutes later,when the passenger's ring for__2__sounded,the air hostess realized it at once. She was kept so__3__that she forgot to deliver him the__4__.As a result,the passenger was__5__to take his medicine.She hurried over to him__6__a cup of water, but to her surprise he__7__it. In the following hours on the__8__,each time the air hostess passed by the__9__,she would ask him with a 10 whether he needed help or not.But the passenger 11 paid attention to her words. When he was going to get 12 the plane, the passenger asked the air hostess to 13 him the passengers' booklet(意见簿). She was very 14 . She knew that he would write down 15 words, which might result in the loss of her job. 16 with a smile she handed it to him. Off the plane,she 17 the booklet and cracked a smile, 18 the passenger put it,"On the flight, you asked me whether I need help or not for twelve times 19 . How can I refuse your twelve sincere smiles?" That's 20 ! Who can refuse twelve sincere smiles from a person? | ||||
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