
【名词&注释】
正确答案:D。A.若a·b>0,则a>0,b>0 B.若a·b<0,则a<0,b<0 C.若a·b=0,则a=0,且b=0 D.若a·b=0,则a=0,或b=0 更多初中的考试资料下载及答案解析请访问不凡考网学历类考试考试频道。
[单选题]下列命题中,正确的是( )。
A. 若a·b>0,则a>0,b>0
B. 若a·b<0,则a<0,b<0
C. 若a·b=0,则a=0,且b=0
D. 若a·b=0,则a=0,或b=0
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举一反三:
[单选题]6. Some of the stickers belong to me,while the rest are_________ .
A. him and her
B. his and her
C. his and hers
D. him and hers
[单选题]春暖花开季节,滨河路边常闻到怡人的紫丁花香味 ,这一现象说明
A. 分子在不停地运动 B.分子分裂成原子
B. 分子很大 D.分子之间有间隔
[单选题]45.1 really want to know_________
A. what is wrong with my brother
B. how will he go to Beijing tomorrow
C. if had he bought that car
D. where did he go yesterday
[单选题]10. —What’ s your_________?—It's cindyjones@163.com.
A. e-mail address
B. telephone number
C. favourite day
D. home address
[单选题]偿债备付率计算时,分子为( )。
A. 息税前利润+折旧和摊销
B. 净利润+利息+折旧+摊销
C. 息税前利润-所得税
D. 利润总额-所得税+折旧和摊销
[单选题]4._______,you haven-t got the chance to study abroad.
A. Luckily
B. Unluckily
C. Lucky
D. Luck
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