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【单选题】
在以下open语句中哪一项无法对文件test.txt进行内容删除或修改？A.
fp = open('test.txt', 'r+')
B.
fp = open('test.txt', 'a')
C.
fp = open('test.txt', 'r')
D.
fp = open('test.txt', 'w')
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举一反三
【单选题】The Prime Minister refused to ________ on the rumour that he had planned to resign.
A.
explain
B.
comment
C.
remark
D.
talk
【简答题】The bank refused to ______him any money, so he had to postpone buying a house. A)credit B)borrow C)loan D)lease
【简答题】已知曲线 的参数方程为 （ 为参数），曲线 的极坐标方程 ． （Ⅰ）将曲线 的参数方程化为普通方程，将曲线 的极坐标方程化为直角坐标方程； （Ⅱ）曲线 , 是否相交，若相交请求出公共弦的长，若不相交，请说明理由．
【单选题】Not only ______ about the food, but he also refused to pay for it.
A.
he complained
B.
had he complained
C.
did he complain
D.
does he complain
【简答题】已知直线l的参数方程： （t为参数）和圆C的极坐标方程： ρ=2 ． （1）将直线l的参数方程化为普通方程，圆C的极坐标方程化为直角坐标方程； （2）若平面直角坐标系横轴的非负半轴与极坐标系的极轴重合，试判断直线l和圆C的位置关系．
【简答题】Her fingerprint left on the scene was a _____ of her guilty. 她在现场留下的指纹是她的犯罪证明。
【简答题】各种计算机的结构都是遵循( )体系结构
【单选题】When he was questioned about the necklace, he__________that he had ever seen it.
A.
hesitated
B.
refused
C.
denied
D.
rejected
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