A.Because they thought he was still in China. B.Because they thought he was put into prison. C.Because they thought he was working for the Chinese government. D.Because they thought he had died.
【简答题】下表是元素周期表的一部分: 1 H 1.008 2 He 4.003 3 Li 6.941 4 Be 9.012 5 B 10.8l 6 C 12.01 7 N 14.0l 8 O 16.00 9 F 19.00 10 Ne 20.18 11 Na 22.99 12 Mg 24.31 13 Al 26.98 14 Si 28.09 15 P 30.97 16 S 32.06 17 Cl 35.45...