Who's that boy? Ms. Miller wants his name.
A:know
B:knowing
C:knows
D:to know
①NO2和N2O4 ②12C和14C ③ 1940 K和 2040 Ca ④异戊烷( )和新
戊烷( ) ⑤ 和 ⑥甲烷和丙烷
1683年,康熙帝命清军进入台湾,对此事最正确的评价是()
如图所示,AB∥CD,AD,BC交于O,∠A=35°,∠BOD=76°,则∠C的度数是( )