按照写作时间,报告可分为几类?()
A.5
B.4
C.3
D.2
参考答案:D
下列说法错误的是( )
A.命题“若x2-4x+3=0,则x=3”的逆否命题是:“若x≠3,则x2-4x+3≠0”
B.“x>1”是“|x|>0”的充分不必要条件
C.若p且q为假命题,则p、q均为假命题
D.命题p:“∃x∈R使得x2+x+1<0”,则¬p:“∀x∈R,均有x2+x+1≥0”
The ID card _____ I lost last week _____ in a supermarket. [ ]
A. that, is found
B. who, is found
C. that, was found
D. whose, was found