把3+[3a-2(a-1)]化简得______.
3+[3a-2(a-1)]
=3+3a-2(a-1)
=3+3a-2a+2
=a+5.
故填空答案:a+5.
结合所示图像,最可能的诊断是()
A.移行上皮细胞癌
B.肾细胞癌
C.淋巴瘤
D.转移
E.以上都不是
沉香主要成分是
A.油胶树脂 B.油树脂 C.香树脂 D.酯树脂 E.单树脂