问题
单项选择题
蛋白质工程的研究内容主要是把现有蛋白质改造为有预期的新特征的突变蛋白质，请问这种对蛋白质的改造是在什么样的水平上进行的（）。
A.细胞水平
B.分子水平
C.基因水平
D.个体水平
答案
参考答案：C
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蛋白质工程的研究内容主要是把现有蛋白质改造为有预期的新特征的突变蛋白质，请问这种对蛋白质的改造是在什么样的水平上进行的（）。
A.细胞水平
B.分子水平
C.基因水平
D.个体水平
参考答案：C
| 完形填空。 | |||
| True forgiveness is one of the most remarkable qualities a human can possess! In the fighting between two countries in the 1970s, a young man was walking from one village to the next when he was 1 by an armed guerrilla (游击队) fighter from the enemy country. The fighter 2 the young man down the hill where he was to be 3 . But a (n) 4 thing happened. The young man, who had 5 military (军事的) training, was able to disarm (解除武装) the fighter. Now, the table was 6 , and it was the fighter who was ordered down the hill. As they walked, 7 , the young man began to reflect on what was happening. Recalling the 8 of his mother, "Love your enemies; do good to those who 9 you." he found he could go no further. He 10 the gun into the bushes, told the fighter he was 11 to go and turned back 12 the hill. Minutes later, he heard footsteps 13 behind him as he walked. "Is this the end after all?" he 14 . Perhaps the fighter had got the gun and wanted to finish him off. But he continued on, 15 glancing back, until his enemy reached him, only to grab him in a hug and pour out 16 for sparing his life. Mercy often wears the face of 17 . And though it usually isn't an enemy in uniform that we are challenged to forgive, we hav 18 for mercy every day. Family members and friends, co-workers and neighbors and even strangers have 19 for our forgiveness. You know who they are. As Mahatma Gandhi said, "The 20 can never forgive. Forgiveness is the attribute (特性) of the strong." Be strong. Forgive. | |||
| ( )1. A. shot ( )2. A. demanded ( )3. A. beaten ( )4. A. amazing ( )5. A. watched ( )6. A. turned ( )7. A. thus ( )8. A. expressions ( )9. A. forgive ( )10. A. packed ( )11. A. free ( )12. A. for ( )13. A. showing ( )14. A. shouted ( )15. A. seldom ( )16. A. marks ( )17. A. awareness ( )18. A. opportunities ( )19. A. need ( )20. A. lonely | B. murdered B. reminded B. shot B. frightening B. received B. covered B. indeed B. plans B. hate B. dragged B. slow B. into B. waving B. counted B. never B. favors B. kindness B. explanations B. responsibility B. weak | C. killed C. ordered C. accepted C. inspiring C. accepted C. moved C. therefore C. words C. instruct C. forced C. nervous C. up C. running C. wondered C. always C. thanks C. safeness C. hopes C. patience C. healthy | D. caught D. required D. driven D. confusing D. suggested D. repaired D. however D. signals D. help D. threw D. eager D. down D. jumping D. argued D. sometimes D. reasons D. forgiveness D. lessons D. energy D. calm |