用二硫化钠（Na2S2）还原硝基苯制备苯胺时，S22-被氧化成：（） A: S0 B: SO C: SO

当空气为22℃时，声音在空气中的传播速度为()。 A: 340m/s B: 344m/s C: 360m/s D: 380m/s

氧化亚铜常用于制船底防污漆。用CuO与Cu高温烧结可制取Cu2O，已知反应：2Cu(s)＋O2(g)===2CuO(s) ΔH＝－314 kJ·mol－12Cu2O(s)＋O2(g)===4CuO(s) ΔH＝－292 kJ·mol－1则CuO(s)＋Cu(s)===Cu2O(s)的ΔH等于( ) A: －11 kJ·mol－1 B: ＋11 kJ·mol－1 C: ＋22 kJ·mol－1 D: -22 kJ·mol－1

Questions 22 ～ 25 are based on the dialogue between Peggy and David about renting a house. Who is Mary A: Peggy’s sister. B: Peggy’s colleague. C: Peggy’s mother. D: Peggy’s roommate.

Questions 22 ～ 25 are based on the following dialogue concerning Ellen’s one trip. What do you know about Thai food from Ellen A: It’s sour. B: It’s sweet. C: It’s bitter. D: It’s hot.

2（22）. A: It sure does. B: Surely. Why not? C: They really look alike. D: It’s up to you.

以下VBA程序运行的结果是( ) Public Sub Form_Click() Dim s As Integer s = 0 For i = 1 To 2 s = 1 For j = i To 3 s = s + i * j Next j Next i MsgBox "s=" &; s End Sub A: 11 B: 18 C: 22 D: 7

执行以下程序段后s的值为() A: 17 B: 22 C: 27 D: 32

串S=”myself“，其子串的数目是（） A: 20 B: 21 C: 22 D: 23

‎串S=”myself“，其子串的数目是（）​ A: 22 B: 20 C: 21 D: 23