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l匕····‘…,…,.烤陀比卿,沛:t,:,t.,.-,tt..- 共派举一孔选择题 1.一个边长为2厘米的小正方体,它的体积为()立方米(用 科学记数法表示). A .2 x 10一6 B.4 x 10一4 C.8 x 10一6D,8 x 106 2.把17毫升溶液四舍五人到lo毫升,就得到近似数20毫升.这 个数的有效数字为(). A .0
l匕···················································烤·········································································烤······································烤····················································· The cube has a volume of () cubic meters (represented by scientific notation). A.2 x 10 -6 B.4 x 10 -4 C.8 x 10 -6D, 8 x 106 2. Take 17 ml of solution Four to five milliliters to give an approximate number of 20 milliliters. The effective number for this number is (). A.0