GPEDIT.MSC
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现在完成时一
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Making choices is necessary, but not always easy.
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1/2 = a (or one) half1/3 = a (or one) third1/4 = a quarter or one fourth1/5 = a (or one) fifth2/3 = two thirds9/10 = nine tenths53/4 = five and three quarters15/64= fifteen over (or by) sixty-four15% = fifteen per cent4‰ = four per mill R’ R primeR” R double prime, R second primeR1 R sub one100° C one hundred degrees Centigrade+ plus; positive- minus; negative´ multiplied by; times¸ divided by± plus or minus= is equal to; equalsº is identically equal to» is approximat