问题
单项选择题
下列关于阿弗他口炎的临床表现描述错误的是（）
A.溃疡最常发生于颊黏膜，亦见于唇内侧、舌部、软腭等部位
B.本病为单发性疾病，无家族性发病现象
C.其自然演变可分为前兆期、疱疹期、溃疡期和愈合期等四期
D.一女性患者多与月经周期相关，在经前期复发或病情加重
E.本病具有自限性，可自然缓解
答案
参考答案：B
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下列关于阿弗他口炎的临床表现描述错误的是（）
A.溃疡最常发生于颊黏膜，亦见于唇内侧、舌部、软腭等部位
B.本病为单发性疾病，无家族性发病现象
C.其自然演变可分为前兆期、疱疹期、溃疡期和愈合期等四期
D.一女性患者多与月经周期相关，在经前期复发或病情加重
E.本病具有自限性，可自然缓解
参考答案：B
某原电池装置中盛有浓KOH溶液，若分别向__________(填“正”或“负”，下同)极通入可燃性气体，向__________极通入O2，则电路中就有电流通过，电流方向由__________极流向__________极，溶液中OH－向__________极移动。试完成下列问题：
| 可燃性气体 | 正极反应 | 负极反应 | 电池总反应 | pH变化 | |
| (1) | H2 | ||||
| (2) | CO | ||||
| (3) | CH4 |
阅读下面短文，掌握其大意，然后从36—55各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。 Teaching my first child, Danae, to share her toys was the biggest challenge. To 36 this, we started inviting other children to play, which could help Danae discover that it’s 37 to share with others – a lesson I needed to 38 myself as well, as it 39 . One evening Danac had 40 a friend, Natalie, to play with her. Their favorite was a children’s 41 game called Go Fish. That evening, 42 Natalie left, Danae came to me and said, “Mommy, I’d like to give these to Natalie tomorrow. They’re her favorites.” She help up three cards from the Go Fish game. I tried to 43 that I didn’t want her to give them away because then our 44 wouldn’t be complete. “But I really want her to have them!” Danae 45 . I thought perhaps she didn’t understand that when she gave something away, it was  gone 46 . So I tried again, saying, “ 47 you give the cards to her, you can’t 48 them back tomorrow.”A look of 49 came over Danae’s face. For a moment I was happy that she seemed to 50 . But then she smiled and sa  id. “Well, that’s okay, I want her to have them anyway.”What could I say to that? I sat 51 for a moment and then I realized I had been trying for so long to 52 her to share. Did it 53 that our Go Fish set would be 54 ? What mattered was that my daughter was learning the 55 of giving, that she was thinking about others instead of herself, and that she was trying to make her friends happy. Isn’t that what life is all about?
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