问题 单项选择题

在工程网络计划执行过程中,如果某项工作实际进度拖延的时间超过其自由时差,则该工作( )。

A.必定影响其紧后工作的最早开始
B.必定变为关键工作
C.不会影响其后续工作的正常进行
D.不会影响工程总工期

答案

参考答案:A

解析: 1Z203033工程网络计划有关时间参数的计算
自由时差是指在不影响紧后工作最早开始的前提下,工作i-j可以利用的机动时间。

单项选择题
阅读理解

阅读理解

     1、American and British people use different greetings. In the USA the commonest greeting is "Hi". In Britain it is "Hello!" or "How are you?".  "Hi!" is creeping(不知不觉地进入) into British, too. When they are introduced to someone, the Americans say, "Glad to know you." The British say, "How do you do?" or "Pleased to meet you." When Americans say "Good-bye", they nearly always add, "Have a good day." or "Have a good trip." to friends and strangers alike. Britons are already beginning to use "Have a good day."

     2、The British usually use "got" in the sense of "have". The Americans hardly ever do.

     Am. E: Do you have a car, room, etc.? Yes, I do.

     Br. E: Have you got a car, room, etc.? Yes, I have.

     3、There are a number of differences between American and British English in the spelling of words,

e.g. check(USA) / cheque (UK). Many American words ending in "or", e.g. honor, labor are spelt in

British English with an "our," e.g. honour, labour. Many verbs in American English with "ize" or "izing"

forms, e.g. organize, realizing are spelt in Br. E with "ise" or "ising", e.g. organise, realising. In American

English, "practice" is used both for the verb and noun. In Br. E, the verb is spelt "practise", and the noun

"practice." In American English, one writes "traveler," while in British English, one writes "traveller".  

     4、It was once predicted that British and American English would become separate languages finally. But the opposite has happened. The links(联系) between the two countries are so strong that linguistically(语言上地), and probably culturally(文化上地) too, they are closer together than ever.

1. The Americans hardly say "_____"

A. Good-bye. Have a good day!    

B. Glad to know you!    

C. Hi!    

D. Have you got a car?

2. What does the third paragraph talk about?

A.There are lots of differences in spelling between Am. E and Br. E.

B.Why do the Americans and the British use different spellings?

C.There are few differences in spelling between Am. E and Br. E.

D.  The different usages of words in Am. E and Br. E.

3. Which of the following is TRUE?

A. The two languages will become separate languages.  

B. American English will be used more and more.  

C. The two languages will be closer and closer.      

D. British English will be used more and more.

4. The underlined word "predicted" means ______.

A. explained        

B. foretold          

C. considered      

D. proved