Building a new school is one thing, whil

教学包含哪些方面

They _____ in a factory now, but they _____ there a year ago.[ ]

A. works; not worked

B. work; didn't work

C. works; isn't working

D. is working; works

圆的周长是它的直径的π倍．______．

与皮肤基底细胞癌的发生可能有关的基因有（）.

A.brca

B.hedgehog

C.p53

D.ptch

E.smoothened

人类社会发展的最终决定力量和根本的推动力是（）。

A.大力改革开放

B.大力经济建设

C.大力发展生产力

D.大力发展科学技术