问题
填空题
若自变量x和函数y满足方程2x+3y=1,则函数解析式为___________.
答案
题目分析:先把含y的项放在等号的左边,其它项移到等号的右边,再化系数为1即可得到结果.
点评:本题属于基础应用题,只需学生熟练掌握解二元一次方程的方法,即可完成.
若自变量x和函数y满足方程2x+3y=1,则函数解析式为___________.
题目分析:先把含y的项放在等号的左边,其它项移到等号的右边,再化系数为1即可得到结果.
点评:本题属于基础应用题,只需学生熟练掌握解二元一次方程的方法,即可完成.
Passage One
When does the speaker say that another significant change in instrument design took place
A.In the early 19th century.
B.In the late 19th century.
C.In the early 20th century.
D.In the mid-20th century.