画一个直角边分别为4厘米和2厘米的直角三角形,再求出它的面积.
(1)如图:
(2)4×2÷2=4(平方厘米),
答:它的面积是4平方厘米.
下列除哪项外,均为肛肠疾病的发病因素 ()
A.风
B.湿
C.气虚
D.血虚
E.阴虚
She had just______the shell of the hard-boiled egg and was starting to peel it off.
A. snapped B. cracked C. fractured D. burst