题目:
---Why not join us in the game?
---I’d love to, but Mother insists that I _________ all my homework first.
A.finish
B.will finish
C.must finish
D.have finished
答案:
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(1)(2分)1s22s22p63s23p63d104s1; 第4周期 VIII族。(2) 3; 1 , 2。(3)(4) SO2; SO3 ; 极性; 非极性(5) Si 、 2 ;(6) ③ 。(7)Cu2++2NH3•H2O= Cu(OH)2↓+2NH4+ Cu(OH...