He was born _______ the morning of June 10th, 1987.
A:at
B:in
C:on
D:for
—I'm hungry. Do you have anything to eat?
—No. Let's ________ super chicken sandwiches.
我会拼(看拼音,写词语)
yǔ máo
fēi cháng
yí dìng
____
zhǎo dào
jué xīn
pāi shǒu
使得关于x的一元二次方程2x(kx﹣4)﹣x2+6=0无实数根的最小整数k为( )
如图1是我国古代著名的“赵爽弦图”的示意图,它是由四个全等的直角三角形围成的.若 AC=6 , BC=5 ,将四个直角三角形中边长为6的直角边分别向外延长一倍,得到图2所示的“数学风车”,则这个风车的外围周长是____.