三角形三个内角的比为2:3:4,则最大的内角是 ▲ 度
80°
设最大角为4x,则另两个角为2x,3x.
则2x+3x+4x=180°,
∴x=20°,
最大角4x为80°.
故填80°.
After the mass shootings at Sandy Hook Elementary School, President Obama ordered his members to ________ solutions to gun violence.
A.put up with
B.come up with
C.keep up with
D.catch up with
明清时期称镌刻约束在学生员条规的碑石为卧碑,它一般树于明伦堂的()边。