当x=3时,6x-15○14,○里应该填[ ]
A.>
B.<
C.=
答案:B
A fastdeveloping China has made a great________on the foreign guests.[ ]
A. expression
B. emotion
C. impression
D. instance
下列哪项是发生阑尾类癌的组织学基础()
A.淋巴滤泡
B.B淋巴细胞
C.黏膜上皮细胞
D.嗜银细胞
E.T淋巴细胞