题目:
转化
答案:
参考答案:
重组质粒DNA分子通过与膜蛋白结合进入受体细胞,并在受体细胞内稳定维持和表达的过程。
转化
参考答案:
重组质粒DNA分子通过与膜蛋白结合进入受体细胞,并在受体细胞内稳定维持和表达的过程。
One afternoon I toured an art museum while waiting for my husband to finish a business meeting. I was looking forward to a quiet view of the wonderful works..
A young couple viewing the paintings ahead of me chatted nonstop between themselves. I watched them a moment and decided she was doing all the talking. I admired his patience for tolerating her constant words. Disturbed by their noise, I moved on.
I encountered them several times as I moved through the various rooms of art. Each time I heard her constant talking, I moved away quickly.
I was standing at the counter of the museum gift store doing some shopping when the couple approached the exit. Before they left, the man reached into his pocket and pulled out a white object. He turned it into a long cane (手杖) and then tapped his way into the coatroom to get his wife’s jacket.
“He’s a brave man,” the clerk at the counter said, “Most of us would give up if we were blinded at such a young age. During his recovery, he made a promise his life wouldn’t change. So, as before, he and his wife come in whenever there’s a new art show.”
“But what does he get out of the art?” I asked, “He can’t see.”
“Can’t see! You’re wrong. He sees a lot. More than you or I do,” the clerk said, “His wife describes each painting so he can see it in his head.”
I learned something about patience, courage and love that day. I saw the patience of a young wife describing paintings to a person without sight and the courage of a husband who would not allow blindness to change his life.
And I saw the love shared by two people as I watched this couple walk away arm in arm.
小题1:Which of the following statements is true?
A.The husband was doing all the talking when the couple viewed the works.
B.The husband tapped his way to the coatroom to get his jacket.
C.The husband was considered a brave man by the clerk at the store.
D.The husband allowed blindness to change his life.小题2:The underlined word “encountered” in the passage means “________”.
A.saw
B.met
C.talked
D.argued小题3:At first the author’s attitude towards the wife of the couple was _________.
A.positive
B.neutral
C.bored
D.admiring小题4:What can be inferred from the passage is ___________.
A.the man had his eyes blinded in a fight
B.the man must be a painter before
C.the woman was very devoted to his husband
D.the man often killed time by visiting exhibitions
发电、输电、供电是同时完成的,电能不能大量储存,必须用多少,发多少是指电力生产的()。
A.同时性
B.整体性
C.快速性
D.连续性
20世纪初中国的革命,主要成果是()。
A.国民革命取得胜利
B.推翻袁世凯独裁统治
C.推翻清朝专制统治
D.马克思主义开始传播
Acrobat的插件必需安装在什么目录下,否则无法使用?()
A、Acrobat/plug-ins
B、Acrobat/Distiller
C、Acrobat/Resource
D、Acrobat/SPPlugins
在营销观念中,()最适合于哪些善于收集单个客户信息的企业。
A.生产观念
B.推销观念
C.客户观念
D.营销观念