入口前后径狭窄是指
A.对角径小于11.5cmB.对角径小于12.5cmC.对角径小于13.5cmD.坐骨棘问径小于10cmE.坐骨棘间径小于11cm
参考答案:C
—Peter, where did you guys go for the summer vacation?
—We ____ busy with our work for months, so we went to the beach to relax ourselves.
A.had been
B.have been
C.were
D.will be
下面说法不正确的是[ ]
A.三角形的面积一定,底和高成反比例
B.长方形的周长一定,长和宽不成比例
C.订阅《少年报》的份数和总钱数成正比例
D.因为圆周长C= πd,所以π与d成反比例