Poland was invaded by both __ in The Second World War. (From Churchill's Speech on Hitler's Invasion of the U.S.S.R.)
A: Germany
B: The U.S.S.R.
C: The U.S.A.
D: France
A: Germany
B: The U.S.S.R.
C: The U.S.A.
D: France
举一反三
- 下列哪一个是5个动物在连续的笼子里可以接受的安排( ) A: Q、S、R、T、U B: Q、T、U、S、R C: Q、U、T、S、R D: S、R、U、T、Q
- 推理证明:(p→q)∧(r→s),(q→t)∧(s→u),Ø(t∧u),p→rÞØp
- 中国大学MOOC: The high point of Churchill’s statesmanship was marked by America’s entry into the Second World War. (Winston Churchill)
- ( )不是正确的推理形式。 A: 前提: p∨q, pÛr, ~q∨s 结论: s∨ B: 前提: ~p∧q, p∨~r, r∨s, sÞu 结论: u C: 前提: pÞ(qÞr) 结论: (pÞq)Þ(pÞr) D: 前提: (p∧q)Þr, ~r∨s, ~s, p 结论: q
- ( )不是正确的推理形式。 A: 前提:¬p∧q,p∨¬r,r∨s,s→u 结论:u B: 前提:(p∧q)→r, ¬r∨s,¬s,p 结论:¬q C: 前提:(p∧q)→r,¬r∨s, ¬s,p 结论:q D: 前提:p∨q,p→s,q→r 结论:s∨