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【单选题】
下列对RNA一级结构的叙述，哪一项是正确的?(    )
A.
几千至几千万个核糖核苷酸组成的多核苷酸链
B.
单核苷酸之间是通过磷酸一酯键相连
C.
RNA分子中AN等于U、G不等于C
D.
RNA分子中含有稀有碱基
E.
mRNA的一级结构决定了DNA的核苷酸顺序
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参考答案：
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【单选题】In my family mother is always the first ______.
A.
to get up
B.
getting up
C.
get up
D.
got up
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A.
正确
B.
错误
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【多选题】大数据时代的五个无处不在,具体指的是()、服务无处不在。( )
A.
网络无处不在
B.
软件无处不在
C.
大数据无处不在
D.
计算无处不在
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【单选题】The children were ______ in observing the busying ants on the ground, not hearing the calls of their mother.
A.
submerged
B.
immersed
C.
drowned
D.
dipped
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【单选题】Hearing the news, he rushed out, the book on the table and disappointed into the distance.
A.
leaving; lying open
B.
left; lay opened
C.
left; lain open
D.
leaving; lie opened
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【简答题】阅读理解。 My name is Jim. I am eleven. I have got a small family. There are three people in it, my father, my mother and I. My father is a teacher of Chinese. He goes to work at 7:30 in the morning and co...
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【简答题】I had been rather proud of myself when my friends and family got the ticket, whether it was for speeding, parking or stop sign violations(违反). It was something that happened to others. But last Friday...
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【简答题】根据短文内容及首字母提示完成单词，补全短文。 My name is Tim.  Here is a p __1 __ of my family.  I have got a big family.  My g __ 2 __ are old (年长的). My grandfather is 65 years old and my grandmother is years old. I hav...
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【简答题】I had been rather proud of myself when my friends and family got the ticket，whether it was for speeding，parking or stop sign violations (违反)．It was something that happened to others. But last Friday I...
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相关题目：
【简答题】会上有人建议任命一个十一人委员会来制定章程。
查看完整题目与答案
【单选题】In my family mother is always the first ______.
A.
to get up
B.
getting up
C.
get up
D.
got up
查看完整题目与答案
【判断题】LDL含量与冠心病发病率呈负相关。
A.
正确
B.
错误
查看完整题目与答案
【多选题】大数据时代的五个无处不在,具体指的是()、服务无处不在。( )
A.
网络无处不在
B.
软件无处不在
C.
大数据无处不在
D.
计算无处不在
查看完整题目与答案
【单选题】The children were ______ in observing the busying ants on the ground, not hearing the calls of their mother.
A.
submerged
B.
immersed
C.
drowned
D.
dipped
查看完整题目与答案
【单选题】Hearing the news, he rushed out, the book on the table and disappointed into the distance.
A.
leaving; lying open
B.
left; lay opened
C.
left; lain open
D.
leaving; lie opened
查看完整题目与答案
【简答题】阅读理解。 My name is Jim. I am eleven. I have got a small family. There are three people in it, my father, my mother and I. My father is a teacher of Chinese. He goes to work at 7:30 in the morning and co...
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【简答题】I had been rather proud of myself when my friends and family got the ticket, whether it was for speeding, parking or stop sign violations(违反). It was something that happened to others. But last Friday...
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【简答题】根据短文内容及首字母提示完成单词，补全短文。 My name is Tim.  Here is a p __1 __ of my family.  I have got a big family.  My g __ 2 __ are old (年长的). My grandfather is 65 years old and my grandmother is years old. I hav...
查看完整题目与答案
【简答题】I had been rather proud of myself when my friends and family got the ticket，whether it was for speeding，parking or stop sign violations (违反)．It was something that happened to others. But last Friday I...
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