问题 单项选择题

已知E工作有一个紧后工作G。G工作的最迟完成时间为第14天,持续时间为3天,总时差为2天。E工作的最早开始时间为第6天,持续时间为l天,则E工作的自由时差为()天。

A.1

B.2

C.3

D.4

答案

参考答案:B

解析:G工作的最迟完成时间为第14天,持续时间为3天,则G工作的最迟开始时间为第ll天;工作G的最早开始时间为第9(11-2)天;E工作的最早开始时间为第6天,持续时间为l天,则E工作的最早完成时间为7天;E工作的自由时差=ESG-EFE=9-7=2(天)。

阅读理解

No one was left in the museum now, and John was walking round to see if everything was all right. Suddenly he saw a beautiful painting lying on the floor. John picked it up and gave it to the director of the museum.

The director called several museums to check and see if it was a stolen painting, but no one claimed (认领) it. So the director decided to hang it in the museum. All the experts came to look at the painting. Each one said it was beautiful and had very deep meaning. The director was proud to have such a painting in his museum and congratulated John on his discovery.

Some weeks later a woman and her little son came to the museum. While they were looking at the new painting, the little boy began to cry. The director went over and asked him.

“Why are you crying?”

The child pointed to the painting and said, “That’s my painting on the wall and I want it back.”

“Yes,” said his mother, “he left it on the floor a few weeks ago. If you look carefully, you can see his name on the painting.”

小题1:John was perhaps _______.

A.a painter

B.an expert on painting

C.a visitor to the museum

D.a man working in the museum小题2:John found the painting _______.

A.before the museum opened

B.after the museum was closed

C.during his visit to the museum

D.while he was enjoying his walk小题3:The boy began to cry before the painting because _______.

A.he was afraid of it

B.he thought it was his painting

C.he wanted to have the painting back

D.Both B and C小题4:After the director heard what the woman and the boy said, he must be very _______.

A.angry

B.afraid

C.surprised

D.proud小题5:All the experts thought the painting good because _______.

A.it was really very beautiful and had very deep meaning

B.the painting was drawn by a famous painter though he was a child

C.all of them did not look carefully enough

D.they examined it very carefully

单项选择题