计算与化简:
(1)a-a3+(2a2)2
(2)(-2x)3+8x2(x-1)
(1)原式=a4+4a4
=5a4;
(2)原式=-8x3+8x3-8x2
=-8x2.
"When is _____ birthday?" "Her birthday is December 19th."[ ]
A. your
B. my
C. Bob's
D. Helen's
下列哪项是三期梅毒的标志,也是破坏性最大的一种损害()
A.树胶肿
B.近关节结节
C.结节性梅毒疹
D.掌跖性梅毒疹