从物体上两点射入到眼睛节点的光线所夹的角称为视角。通常用眼睛能分辩的最小视角的倒数来表示眼睛的分辨本领，称为视力.
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善于学习语言的人能够把他们的错误变成通向成功的一大步。
A. People who good at learning Language can turn their mistakes into a big step on success.
B. Good language learners can turn their mistakes into a big step toward their success.
C. Welllanguage learners can turn their mistakes into a big step toward their success.
D. People who good at language can turn their mistakes into a big step toward their success.
这次事故给了他一个教训，从那以后他再也不会酒后驾车了。
A. The accident taught him a lesson, and from then on, he would never drive a car after drink.
B. The accident taught he a lesson, and from then on, he will never drive a car after drink.
C. The accident taught him a lesson, and from then on, he would never drive a car after drinking.
D. The accident taught he a lesson, and from then on, he would never no longer drive a car after drinking.
She knew they were having the same troubles that she had experienced.
A. 她了解他们正在经历着她以前经历过的同样的麻烦。
B. 她知道他们正在经验着她以前经历过的同样的麻烦。
C. 她知道他们和她以前经历过的麻烦一样。
D. 同样，她了解他们正在经历着她以前经历过的麻烦。
Within four years, she has managed to become so fluent in English that she doesn’t even have a foreign accent!
A. 在短短四年的时间里，她的英语设法变得如此流利，以至于她甚至不带外国口音！
B. 在短短四年的时间里，她想办法把英语变得如此流利，以至于她甚至不带外国人的口音！
C. 四年的时间里，她的英语设法变得如此流利，以至于她甚至不带外国口音！
D. 在短短四年的时间里，她能说一口流利的英语，而且不带外国口音！
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