如图中被测物体的长度是 ____ cm,该刻度尺的分度值是____ cm.
如图,矩形ABCD的对角线AC、BD交于点O,∠AOB=60°,AB=3,求BD的长.
The book was written in _______ easy English _______ even primary school students could understand it.
关于x的一元二次方程(a﹣1)x2﹣2x+3=0没有实数根,则整数a的最小值是( )
kǎi xuán
zhuó zhuàng
chén wěn
zāo tà
____