下面各种说法中正确的是[ ]
A.被减数一定大于差
B.两数的和一定大于每一个加数
C.积一定比每一个因数大
D.两数相等,它们的绝对值一定相等
答案:D
__Shall I begin the lecture?
__I'm afraid we have to wait for a while.John is coming with a microphone.
__________.I can do without the microphone.[ ]
A.I'm sorry
B.Excuse me
C.I beg your pardon
D.Never mind
建设主管部门按照规定逐级上报事故情况时,每级上报的时间不得超过()h。
A.1
B.2
C.3
D.4