老年阶段面临的主要问题有（ ）。 A．产生无用感 B．产生孤独感 C．易受各类疾病折

______ do you come from?  Shanghai.     [ ]

A. What        

B. Where          

C. How          

D. Who

某元素原子序数为85，下面关于该元素说法不正确的是：（   ）

A．AgAt 不溶于水

B．HAt很不稳定

C．At的单质是白色固体

D．该元素位于元素周期表第六周期、第十七列

Questions 1-4

Which of the following is true about the college dictionary？（）

A．It lists abbreviations, proper nouns, and tables of measures.

B．It is an unabridged edition providing as many as 500,000 entries.

C．It was randomly compiled and contains as many foreign words as possible.

D．It provides detailed information of famous people and places.

具有很强的穿透力和杀菌力，操作简便，时间短、见效快的防霉方法是（）

A.密闭

B.对抗同贮

C.⁶⁰Co-γ射线辐射

D.气调养护

E.低温冷藏

预留印鉴挂失客户要提供哪些证明材料？