读我国某地相关要素示意图，回答下列各题。 小题1:如果图示时刻是北京昼长最短的

下 * * 种肝炎病毒中哪一个为DNA病毒（）。

A.HDV

B.HCV

C.HBV

D.HAV

E.HEV

My father is now in his late forty but he looks young for his age. He is very strict with me, especial in my studies. Besides, I know he loves me deeply in his heart. Once I had failed to do well in my math exam, I was afraid that it would make my father angry and disappointing. On contrary, he said I had tried my best and offered him a few words of encouragement. He told me that there is no need to feel bad about one and two failures and the most important thing is to learn anything from failure and never give up. Today is Father’s Day and I want to say thank you for my father.

布氏杆菌病的主要临床特征为（）

A.关节疼痛

B.出汗多、大量出汗可致虚脱

C.长期发热

D.肝、脾肿大

E.慢性化后关节畸形

颌面部CT扫描技术的适应证不包括（）.

A.腮腺肿瘤

B.甲状腺癌

C.颌面部骨折

D.美容整形

E.化脓性腮腺炎

下列选项中，不属于计算机病毒特征的是（）。

A.破坏性

B.免疫性

C.传染性

D.潜伏性