黑龙江专升本考试人员免考申请规定

甲购买乙100套塑钢窗，约定9月8日交货。因乙的产品放在丙仓库，乙告知甲由丙代办履行。后丙将100套塑钢窗错发给了丁，致使未能向甲按期交货。对此，甲有权要求（　　）。

A.丙承担逾期交货的违约责任

B.乙或者丙承担逾期交货的违约责任

C.乙和丙连带承担逾期交货的违约责任

D.乙承担逾期交货的违约责任

It was Ann′s first experience of flying..She had always been afraid of heights and so was prepared?to be frightened.Only the fact that she was going to meet her son who she had not seen for?three years had given her the courage to make the flight.
She sat in her seat,her hands gripping its arms,her seat belt already fastened.The air hostess?was talking,telling everyone what to do in case of emergency,showing them where their life-jackets?were.The plane was crowded,and every seat was full.From her window seat,getting out in a hurry?would be impossible,thought Ann.In any case who would want to get out of a plane in mid-air?
The engines began to shake--the noise increased till it was like a great rushing wind.She?looked out to see the runway slip past at astonishing speed.She wanted to cry out--to stop the plane?before it left the ground,but she knew she was trapped in this great roaring machine.I must scream,she told herself,and put her hands over her eyes.
There was a strange feeling as if she were going up in a lift.The noise died down.Carefully she?opened her eyes.Through the window she saw a great carpet of cloud above,so beautiful that she?stared in wonder,hardly turning away from the window till they touched down.


How did Ann feel after she had opened her eyes?《》（）

A.Very much pleased.
B.Very much frightened.
C.Greatly attracted.
D.Greatly surprised.

This town is famous__its historical homes.

A.for
B.about
C.with
D.by

微分方程y′′+6y′+13y=0的通解为.