题型:选择题 _________a reply from his son in Japan, he decided to write again.[ ]A. Not to receive B. Receiving notC. Not having received D. Having not received 查看答案
题型:解答题 直接写出得数 2.5×0.4=1.7+5=0.72÷0.6=7.96-7.9=1.5÷0.3=2.8×0=1.5×6=0.25×16=2.5×100=4.8÷6=0.5×0.9=6.1-6.1=0.12×5=4.8+5.7=28-3.6-4.4=5÷2.5=(4.8+3.2)÷4=8.4÷21=0.5×0.08=8.3÷0.01=0.5÷0.5+0.5÷0.5=4-0.4=2.4×0.5=0.99+0.01÷10= 查看答案
题型:填空题 工商部门的执法人员为检查某种品牌的1万瓶矿泉水是否符合食品卫生标准,随机抽取了100瓶样品进行化验,在这次调查中,工商部门的执法人员采取了哪种调查是( ).调查中考察对象的总体是( ),个体是( ) .样本是( ). 查看答案