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。
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。
Three other types of airspace, Classes D, C and B, govern the vicinity of airports.
其他三种领空，D、C和B类，管理着机场周围地区。
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。
A: Scientists have identified five unique hepatitis viruses, identified by the letters a, b, c, d, and E. While all cause liver disease, they vary in important ways.
答：科学家们已经识别出五种截然不同的肝炎病毒并以甲、乙、丙、丁、戊型作为辨识。虽然它们都会引起肝病，但在重要方面又有所不同。
Figure 3: Performance TAB shows you a letter grade (a, b, c, d, f) and a percent grade (1-100).
图3：性能标签使用字母(A,B,C,D,F)表示等级以及当前等级(1- 100)。
Scientists have identified five unique hepatitis viruses, identified by the letters A, B, C, D, and E. While all cause liver disease, they vary in important ways.
科学家们已经识别出五种截然不同的肝炎病毒并以甲、乙、丙、丁、戊型作为辨识。虽然它们都会引起肝病，但在重要方面又有所不同。
However, facts A, B, and C are never used again; they were instrumental to the argument because they allowed one to establish D, but once D is established, A, B, and C can be safely forgotten.
然而，A,B和C再也没有被使用到；他们只是辅助性的证明，因为它们被用来建立D，然而一旦D被建立起来后，A,B,C可以被毫无顾虑地忘掉。
The task executes when it receives business items A and B, or C and D, or B and C as inputs.
任务在接收到业务项A和B，或C 和D，或B 和 C作为输入时，该任务将执行。
D Because if I have equal amounts of a, B, c, and d, that's a lot of entropy of mixing there.
因为如果我们有等量的A,B,C和，那么混合熵会很大。
For example, my new habits to: (a) Wake up early at 5am (b) Sleep before 12am (c) Be on time (d) Meditate (e) Have raw food diet are all interlinked.
例如，我的新习惯：（a）在五点早起（b）在十二点之前睡觉（c）按时（d）思考（e）吃一次自然的食物全是相连的。
Since the sum b+c+d is a multiple of 5, and at least one of the terms is a multiple of 5, either only one is, or all are.
因为b+c+d所得是5的倍数，所以其中至少有一个数值是5的倍数，或者只有一个，或者三个都是。
These include pre- and post-increment/decrement ( i++, --foo ), add/sub/mult/div assign operators ( a+=3, b*=2, c/=2.2, d-=6.2 ).
其中包括前后加/减（i++、--foo）， 加减乘除赋值运算符（a+=3、b*=2、c/=2.2、d-=6.2）。
CrashMetrics ticks all the important boxes: a accuracy, b correct level of mathematics, c understandability, d robustness, e flexibility, f ease of use.
CrashMetrics符合下列一切要求：a准确，b正确的量化程度，c易理解，d稳定，e灵活，f易用。
Is it: a Greek, B Phoenician, c Sumerian or D Latin?
是A希腊语b腓尼基语c苏美尔语还是d拉丁语？
"The claim," he writes, "was made relative to the (a) share of (b) mobile platforms (c) installed base (d) in the US."
“这种说法，”他写道，“是基于(1)份额；(2)移动平台；(3)装机量；(4)在美国。”
If a user's PATH is set to a: B: c: d, the shell first attempts to find the command in directory A. If it isn't found there, the shell moves on to look in directory B and so on.
如果用户的PATH被设置为A：B：C：D，那么shell将首先尝试在目录a中查找命令。
In Section 2, facts A, B, and C are derived, and then used to deduce D.
第二小节中的事实A,B,C被推导出来，并用于证明D。
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。
Another thing, all your prices are on a C. I. F. basis. We 'd rather you quote us F. O. B. prices.
还有一件事，你们的报价都是成本加运费保险费的到岸价格，我们希望你们能报船上的交货价。
Method Portal hypertension was induced by portal vein stenosis(PVS) in 30 rats subdividing into 3 groups:group B (Model), group C in which L arginine was given, and group D receiving L NAME.
方法采用门静脉部分缩窄（PVS）制成门静脉高压模型的30只大鼠被均分为3组：模型组（B）、左旋精氨酸组（C）、单甲基精氨酸组（D）。
The main silk roads between 500 B. C. and 500 A. D.
公元前500年到公元500年之间的主要丝绸之路。
There were significant differences of COR between group A and D and of bile production and COR between group C and D (P< 0.05), and there was no significant difference between group B and D.
组、D组耗氧率和C组、D组胆汁生成量及耗氧率的差异均有统计学意义（P<0.05），而B组、D组间各指标差异无统计学意义。
The Old Testament was written from 1400 to 400 B. C., and the New Testament from 30 to 100 A. d.
旧约写于公元前400年到公元前1400年，而新约则写于公元30年到公元100年。
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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