题型:选择题 某农科院对甲、乙两种甜玉米各用10块相同条件的试验田进行试验,得到两个品种每公顷产量的两组数据,两组数据的平均数相同,其方差分别为s甲2=0.002、s乙2=0.03,则下列说法正确的是 A.甲比乙的产量稳定B.乙比甲的产量稳定C.甲、乙的产量一样稳定D.无法确定哪一品种的产量更稳定 查看答案
题型:选择题 — By the way, have you moved into the new house? — Not yet. The walls _____.[ ]A. were painted B. are being painted C. are painted D. are painting 查看答案