After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听到问题后，必须从A、B、C、D四个选项中选出最佳选项。
For each of them there are four choices marked A, B, C and D. You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.
每题都有对应标记的A、B、C和D四个选项，请选择最佳选项并在答题卡2的相应字母中间划横线。
In the A, B, C, D and F grading system, the first four letters are typically considered passing grades.
在A、B、C、D和F评分体系中，前四个字母通常被认为是及格。
"I'll give you four pennies for your A-B-C book," said a ragpicker who stood by.
“我给你四便士买你的识字课本。”一个站在旁边拾破烂的人说。
The intensity of brightness seen in Comet McNaught C/2009 R1—named after the Australian astronomer who first spotted it in September 2009—only occurs once every four years or so, Cook said.
以首次发现它的澳大利亚天文学家的名字所命名的麦克诺特彗星C/2009R1，其明亮强度每四年左右出现一次，库克说。
The genetic information of all living cells is stored in the DNA composed of the four canonical bases adenine (a), cytosine (c), guanine (g) and thymine (t).
所有活细胞的基因信息都储存在由四种碱基，即腺嘌呤(A)、鸟嘌呤(G)、胞嘧啶(C)、胸腺嘧啶(T)构成的DNA里。
There were $111 billion of loans in the group, made to three borrowers: Citigroup (C) (five times), Bank of America (BAC) (four times) and Morgan Stanley (MS) (once).
这一类贷款共有1110亿美元，借款方主要是下面三家银行：花旗集团（Citigroup）（五次）、美国银行（Bankof America）（四次）和摩根士丹利（Morgan Stanley）（一次）。
On some platforms it is compatible with the C type wchar_t, which is usually two -- but sometimes four -- bytes wide.
在一些平台上， XMLCh与C类型 wchar_t兼容， 后者通常是两个——但是有时是四个——字节宽。
Create a c: \ flatfiles folder, and create four subfolders in it.
创建c： \flatfiles文件夹，然后在其中创建四个子文件夹。
The sample Calculator code, Calculator.cs (see the download file), is a C# class with four methods (add, sub, mul, div).
样本Calculator代码 Calculator.cs （请参阅下载文件）是一个有4 个方法（add、sub、mul 和div）的 C#类。
Because of "Plan C", day two, three, and four of my cat-sitting adventure went smoothly.
由于“C计划”的缘故，我第二、第三和第四天照看猫的工作进行得非常顺利。
To limit the risk to a one-in-four chance [of 2 degree C warming], then total CO2 in the first half of the 21st century has to be kept below [one trillion] metric tons.
要想将风险限制到四分之一（变暖2摄氏度），那么21世纪上半段CO2的总排放量必须保持在一万吨之下。
The ancient Olympic Games were held every four years from 776 B. C. to 394 A. D. The modern Olympic Games were revived in 1896.
自公元前776年到公元394年，古代奥运会每四年举办一次，现代奥林匹克运动会在1896年又得以恢复。
All four C-130s based in Elizabeth City, N.C., are flying on patrols on Friday, but will move inland as far as West Virginia as the storm approaches.
4架驻扎在北卡罗莱纳州伊丽莎白市的c - 130运输机在周五参与了巡逻飞行，但会在风暴来临前转移到更远的西弗吉尼亚。
Typical gains for a pure Python program are between two and four times, but lxml does most of its work in C, so the difference is unusually small.
一个纯Python程序的典型性能收益是普通程序的2 至4倍，但是lxml 使用C 语言完成了大部分工作，因此它们之间的差别非常小。
Over four decades have elapsed since the Air Force issued its original design specification, yet the remarkable C-130 remains in production.
经过40多年的时间，美国空军公布了其原始的设计图，而性能卓越的C - 130至今还在生产着。
It was about four in the afternoon when a young girl came into the salon of the little hotel at C— in Switzerland, and drew her chair up to the fire.
差不多下午四点钟，一个年轻的女孩来到瑞士C城一家小旅店的会客室，并把椅子拉到了炉火旁边。
C: (counts it) Four fifty yuan.Here's your change.
出纳员：(数钱)共是450元，这是找给您的零钱。
DOMWriter provides an API for writing a DOM node into various types of output streams. Xerces-C + + supports four types of output streams.
DOMWriter提供了一个API，用于将DOM节点写入各种类型的输出流中。
In fact, four years ago, 15 of them were shipped to Washington D. C. and put on exhibit at the National Geographic Museum, where visitors could come and see them face to face just like I did today.
其实，四年前，其中15个陶俑就被运到华盛顿特区，在国家地理博物馆进行展览，当时就有很多游客像我今天一样近距离观赏过兵马俑。
C: Are these four pieces all your luggage?
地勤：这四件行李都是你们的吗？
Heredity information array in genes is the four bases a, C, g, t array.
遗传信息在基因中的排列是指四种碱基a、C、G、T的排列。
This paper summarizes the tests under cyclic reverse loading of four cruciform R. C. frame beam-column joints which are strengthened by enlarging column sections.
本文概述了四个十字形钢筋混凝土框架节点试件采用柱加大截面法加固后，在低周反复荷载作用下的试验。
This paper firstly introduced the characteristic of P2P, compared P2P mode and C/S mode, then researched four structures of P2P net topology.
本文首先阐述了P2P网络的特性，比较了P2P模型与C/S模型，然后研究了P2P的四种网络拓扑结构模型。
Since two thousand five, the F. C. C. has used four policy principles to guide its enforcement in cases related to the Internet.
自2005年以来，FCC采用了四个政策性原则，以保证网络相关案例的执法。
The four main levels of our classification are protein class (c), architecture (a), topology (t) and homologous superfamily (h).
我们的分类中的四个主要层次是蛋白质类(C)，结构(A)，拓扑结构(T)和同源超家族(H)。
During the pause, you must read the four choices marked a, b, c and d, and decide which is the best answer.
在中止的时候，你一定读了四被作记号的选择一，B，c和d，而且决定最好答案是哪一。
During the pause, you must read the four choices marked a, b, c and d, and decide which is the best answer.
在中止的时候，你一定读了四被作记号的选择一，B，c和d，而且决定最好答案是哪一。
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