已知1mol白磷变成1mol红磷放出18.39KJ的热量，下面两个反应：4P（白

在数据库系统中，实现各种数据管理功能的核心软件称为 【3】 。

Dear Li Hua,

I’m sorry to hear that you are not feeling well in ______. You say your English is _______ , so you are nervous and feel tired. You have ______ headaches . I think you should relax and not stay late at _______. You should talk more with your _______ in English. And you can also ______ your teachers for help.

Of course, life in America is ______ from that in China, so you should try ______ be used to the life there. Take more exercise and have a healthy diet, and then you can ______.

Please _______ yourself! I hope you will enjoy your life in America soon.

小题1:A. Beijing        B. Tokyo          C. New York

小题2:A. good         B. poor            C. better

小题3:A. many         B. few            C. much 

小题4:A. noon           B. weekends      C. night

小题5:A. classmates      B. teachers        C. brothers

小题6:A. speak          B. ask            C. try

小题7:A. the same       B. different        C. difference

小题8:A. for            B. to             C. with

小题9:A. keep healthy     B. stay health     C. is good health

小题10:A. take care       B. look for       C. look after      

通过公有派生类的对象，只能访问基类成员中的

A．公有成员

B．私有成员

C．保护成员

D．公有成员和保护成员

患儿男性，9岁，因“周身皮疹伴瘙痒2周”来诊。患者2周前周身起疹，色白，自觉瘙痒。皮疹此起彼愈，全身游走，多在晨起及入夜时发作，遇冷水或受风寒后加重，得暖则轻。经口服抗组胺药，静脉注射葡萄糖酸钙、地塞米松等治疗，仍旧反复发作。发作时不伴有腹痛、腹泻以及呼吸不畅等症状。否认发病前有服药史以及既往类似发作史。恶寒畏风，口不渴，纳可，二便调，夜寐欠安。舌淡红，苔薄白，脉浮缓。查体：躯体、四肢可见散在大小不等的白色风团，周围有少许红晕，皮肤划痕征阴性。

此患儿的西医诊断是（）

A.水痘

B.多形性红斑

C.药疹

D.荨麻疹

E.色素性荨麻疹

F.接触性皮炎

G.湿疹

纳税人外出经营活动结束后，应当向主管税务机关缴销发票。（ ）