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【单选题】
对图示结构中的O原子带电情况描述正确的是：【图片】A.
-1
B.
-2
C.
+1
D.
0
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举一反三
【简答题】In her bedroom I found mismatched __1__ on the bed and purple pants on the closet floor. Desk drawers are filled with school papers, __2__by year and subject. I __3__ myself reading through poems and...
【简答题】阅读理解,判断句子是否与短文相符,相符的用“T”表示,不相符的用“F”表示。 I’m Liu Tao.I’m a Chinese boy.I’m a student.I get up at six thirty.At six fifty I have breakfast.I go to school at seven ten.I have four lessons in the morning a...
【简答题】粗面内质网膜上的核糖体结合蛋白是______，这类蛋白对核糖体有高度亲合力，可与核糖体______结合。
【单选题】核糖体是合成蛋白质的机器,下面关于核糖体说法有误的是
A.
核糖体在各类细胞中普遍存在
B.
核糖体是一种无膜包被的颗粒状结构
C.
核糖体具有很强嗜碱性
D.
核糖体体积较大，可在光镜下分辨清楚
【简答题】A．游离核糖体 B．附着核糖体 C．多核糖体
【简答题】核糖体是合成()的场所。
【多选题】mismatched | catch | admiring | corner | filled In her bedroom I find __1__socks under her bed and purple pants on the closet floor. Desk drawers are __2__with school papers, filed by year and subject...
A.
mismatched
B.
filled
C.
catch
D.
admiring
E.
corner
【简答题】一、指出下列从句的类型 1. I hope that everything is all right. 2. She was reading the newspaper when I came in. 3. She is the girl who sings well. 二、简单句合成一个复合句 1. He has found out. She was late. (why) 2. I st...
【简答题】How are you, everyone? I am Jane. This is a bedroom. My sister and I live in it every day. You can see two beds, a desk and two chairs in it. This is___ bed. There are some cute dolls on ___ bed. This...
【单选题】DNA的复制、转录和蛋白质的合成场所分别是 [ ]
A.
细胞核、核糖体、核糖体
B.
核糖体、细胞核、核糖体
C.
核糖体、核糖体、细胞核
D.
细胞核、细胞核、核糖体
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