问题
单项选择题 A1/A2型题
一条DNA链序列为-TGAACGTGT-，其互补链序列为（）。
A.-AGCGCATTA-
B.-ATTAGCGCA-
C.-ACACGTTCA-
D.-AUUAGCGCA-
E.-ACGCGAUUA-
答案
参考答案：C
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一条DNA链序列为-TGAACGTGT-，其互补链序列为（）。
A.-AGCGCATTA-
B.-ATTAGCGCA-
C.-ACACGTTCA-
D.-AUUAGCGCA-
E.-ACGCGAUUA-
参考答案：C
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| Rose didn’t see her school IC card at lunch time. She asked her classmates and looked for it everywhere. But she couldn’t 1 it. Later, one girl said that she saw Kate take a card from Rose’s desk. So Rose got very 2 . When she met Kate in the afternoon, Rose 3 , “You have stolen(偷) my card!” Hearing this, Kate began to cry, “No, no, I didn’t steal it! I only took it by 4 .” But Rose didn’t think so and they began to fight. Just then a teacher came up and 5 what had happened. Kate told the whole story. She said her pen pal came to see her in the morning. She was so 6 that she took the card carelessly. Then they went for lunch happily. “I used the card, but I had thought it was mine. I didn’t know it was Rose’s 7 she asked. I was too afraid to explain it to her. So I decided to put the 8 back with some money secretly. I am sorry, Rose.” Kate said in a low 9 . "It’s just a misunderstanding(误会)!" said the teacher. Tears(泪水) came into Rose’s eyes. Then she said, “I was 10 sorry, Kate! I hope we are still good friends. ” | |||
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