题目

After working ________ with each other for months, they felt so ________ to each other that they began to share lunch together.        A. closely; closely     B. closely; close      C. close; close           D. close; closely 答案：B别用“p或q”“p且q”“非p”填空．（1）命题“3的值不超过2”是  形式；（2）命题“方程（x-2）（x-3）=0的解是x=2或x=3”是  形式；（3）命题“方程（x-2）2+（y-3）2=0的解是x=2y=3”是  形式．