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When I was twelve years old, I had an enemy, a girl who liked to tell me about my shortcomings. Week by week her list became 1 : I was very short, and I wasn't a good student, I talked too much, and so on. I tried to stand all of these as long as I could. Finally I became very 2 .I ran to my father with tears in my eyes. He listened to me 3 ,and then asked , “Are these things that she said true or not? Jane, have you ever 4 what you're really like? Now you have the girl's 5 . Go and make a list of everything she said and mark the points that are 6 . Pay no attention to the other things that she said .” I did 7 he told me. To my great surprise, I found that about half of the things were true. Some of them I couldn't 8 , like being very short, but a good number of them I could. I wanted to change the bad things in me, and for the 9 time I knew something about myself in a very clear way. I brought the list back to my father. He 10 to take it. “That's just for you,” he said, “You know better than 11 else the truths about yourself, but sometimes others' opinions are also important, so you have to learn how to 12 and just close your ears in anger and feel hurt. When something 13 is said about you is true, you'll find that it will be of help to you. Our world is full of people who think that they know you. Don't shut your ears. Listen to all of them, 14 hear the true and do what you think is the right thing to do.” I have remembered my father's 15 at many important moments. I have never had a better piece of advice in my whole life.
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【判断题】一台Y/Δ连接的三相电力变压器,副绕组在经过检修后欲接回Δ,在激昂副绕组接成闭合的Δ前,先测三角形的开口电压,其值为2倍的相电压,其值为2倍的相电压,这说明副绕组中有一绕组极性接反。
A.
正确
B.
错误
【单选题】1053. CA6140 型车床使用多年,对车床电气大修应对电动机进行( )。
A.
不修理
B.
小修
C.
中修
D.
大修
【单选题】我国某主港潮汐 T HW 1038 , H HW 489cm ,其附港的潮差比为 0.76 ,潮时差 -0015 ,改正值 -30 ,则该附港的 T HW , H HW 为 。
A.
1023 , 295
B.
 1053 , 365
C.
1053 , 335
D.
1023 , 342
【单选题】用放射性同位素分别标记U和T的培养基培养蚕豆根尖分生区细胞,观察其有丝分裂周期为20小时,根据这两种碱基被细胞利用的速率,绘制成的曲线如下图所示,下列对此结果的分析中,不正确的是()
A.
b点时细胞正大量合成RNA
B.
d点时细胞中DNA含量达到最高值
C.
处于a~e阶段的细胞数目较多
D.
c~e阶段,细胞内最容易发生基因突变
【单选题】对“如果灯亮,那么有电”和“如果灯不亮,那么无电”这两个命题同时肯定,则( )
A.
不违反矛盾律也不违反排中律
B.
既违反矛盾律又违反排中律
C.
只违反矛盾律
D.
违反矛盾律
【单选题】某科学家用放射性同位素分别标记的 T 和 U 培养基培养蚕豆根尖分生区细胞,观察其有丝分裂,已知蚕豆有丝分裂周期为20小时,根据这两种碱基被细胞利用的速率绘制的曲线如下图所示。下列对此结果的分析中,不正确的是
A.
b 点时刻,细胞正大量合成 RNA
B.
d 点时刻,细胞中 DNA 含量达到最大值
C.
ce 段,细胞最容易发生 DNA 改变
D.
在显微镜下,处于 ae 段的细胞数目较多
【单选题】用放射性同位素分别标记U和T的培养基蚕豆根尖分生区细胞,观察其有丝分裂周期为20小时,根据这两种碱基被细胞利和的速率,绘制成的曲线如图所示。下列对此结果的分析中,不正确的是 [     ]
A.
细胞首先大量合成RNA随后才合成DNA
B.
在第5到15小时之间细胞核明显增大
C.
在第10到20小时之间RNA和DNA的合成速率都不可能再增加
D.
应该在第15到20小时之间诱导染色体加倍
【单选题】用放射性同位素分别标记U和T的培养基培养蚕豆根尖分生区细胞,观察其有丝分裂周期为20小时,根据这两种碱基被细胞利用的速率,绘制成的曲线如图所示。下列对此结果的分析中,不正确的是 [     ]
A.
细胞首先大量合成RNA随后才合成DNA
B.
在第5到15小时之间细胞核明显增大
C.
在第10到20小时之间RNA和DNA的合成速率都不可能再增加
D.
应该在第15到20小时之间诱导染色体加倍
【单选题】对“如果灯亮,那么有电”和“如果灯不亮,那么无电”这两个命题同时肯定,则
A.
只违反矛盾律
B.
违反矛盾律
C.
既违反矛盾律又违反排中律
D.
不违反矛盾律也不违反排中律
【单选题】用放射性同位素分别标记U和T的培养基培养蚕豆根尖分生区细胞,观察其有丝分裂周期为20小时,根据这两种碱基被细胞利用的速率,绘制成的曲线如图所示。下列对此结果的分析中,不正确的是()
A.
b点时刻,细胞正大量合成RNA
B.
d点时刻,细胞中DNA含量达到最大值
C.
处于a~c阶段的细胞数目较多
D.
c~e阶段,细胞内最容易发生基因突变
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