现象在一次五年级数学期末测试中,试卷中有这样一道选择题:【题1】大象能活70年,大象的寿命比长颈鹿寿命的3倍少5年。长颈鹿能活多少年?设长颈鹿能活x年,下列方程中正确的是()(多选)。①3x=70-5②3x-5=70③3x=70+5④3x-70=5测试结果,全年级四个班238名学生中只有11名学生做对,正确率只有4.6%。在同一份试卷中,还有一道与题1数量关系基本 Phenomenon In a fifth grade mathematics end of the test, there is a multiple choice question in the test paper: 【Question 1】 The elephant can live for 70 years, and the life expectancy of an elephant is three times less than that of a giraffe for 5 years. Giraffes can live for many years? Set giraffe to live x years, the following equation is correct () (multiple choice). ① 3x = 70-5 ② 3x-5 = 70 ③ 3x = 70 + 5 ④ 3x-70 = 5 As a result of the test, only 11 of the 238 pupils in the four classes in the whole year were correct, with a correct rate of only 4.6%. In the same test paper, there is a basic quantitative relationship with the title 1