问题 单项选择题

图所示结构,截面A、B的受拉侧分别为()。

A.外侧、外侧

B.内侧、内侧

C.外侧、内侧

D.内侧、外侧

答案

参考答案:D

解析:

由于C处为滑动联结,则BD杆剪力为零,由CDE部分平衡可知E处反力为零,进而将荷载对A、B取矩,可判断其受拉侧,或心算弯矩图形状,注意均布荷载合力作用线与AB线的交点弯矩为零,即可作出判断。

阅读理解

Mum went to Peter’s bed and said, “I want to borrow Tim’s radio for you?” Peter touched the letter in his pocket (口袋) and said, “Thanks, Mum!” “Today I want to send you a special gift on the radio. It’ll surprise you. I will come back soon,” she said and quickly left in the heavy snow.

Peter took out the letter. He got it this afternoon. Mum didn’t know about it. Mum wrote in the letter: The 26th of this month is my son Peter’s birthday. Could you bless(祝福)him? He has been ill for one month. The radio station wrote in the top: I’m sorry that we have cancelled(取消) this program.

Mum came back with a radio. There was lots of snow on her clothes. And the program began quickly. Next, Peter got very surprised. “At first, we planned to cancel this program, but lots of people like it very much. Now, let’s bless the following(下列的) people together. Kate, Martin, Linda┅” The list was very long. Mum was too tired and she fell asleep. Peter didn’t hear his name to the end. But he was quite moved. He woke up Mum, “Mum, I heard my name just now. Thank you for your gift, Mum!” Mum smiled with tears. Peter also smiled with tears. He believed it was his best gift.

小题1:It was ____________ in Peter’s birthday.

A. rainy              B. snowy                  C. windy

小题2: What was Mum’s special gift to Peter?

A. She wrote a letter to him.           B. She blessed him in the radio.

C. She asked the radio station to bless him.

小题3:Why didn’t Peter give the letter to his mother?   Because _________________.

A. he was ill for a month             B. his mother was very tired

C. his mother would be disappointed

小题4:How did Peter’s mother feel after the program?

A. Moved              B. Tired              C. Surprised

小题5: What do you think of Peter?

A. He is a brave boy.     B. He likes telling lies.       C. He loves his mother.

多项选择题