由3x+5y=10,得到用x表示y的式子为y=______.
移项得:5y=10-3x,
系数化1得:y=15(10-3x)=2-35x.
故填:2-35x.
Mrs Green is _____________ mother. They are _____________.[ ]
A. Lucy and Lily's, twins
B. Lucy's and Lily's, twins'
C. Lucy and Lily's, twin
D. Lucy's and Lily's, twins
延度较大的沥青,则其()较好。
A.气候稳定性
B.温度稳定性
C.粘结性
D.塑性