---Did you enjoy that trip? ---I’m afraid not. And ______. A.my classmates don’t either B.my classmates don’t too C.neither do my classmates D.neither did my classmates
A.
my classmates don’t either
B.
my classmates don’t too
C.
neither do my classmates
D.
neither did my classmates
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【判断题】证明: (p∧q)→r,¬r∨s,¬s,p蕴含¬q 过程如下: 证明: (1) q P(附加前提) (2) ¬r∨s P (3) ¬s P (4) ¬r T(2)(3)I (5) (p∧q)→r P (6) ¬(p∧q) T(4)(5)I (7) ¬p∨¬q T(6)E (8) p ...