Linux中所有用户的信息保存于（）和（）文件。

一束光线射入平面镜，其反射光线跟镜面成25°角，其入射角是             ，经平面镜反射后，光线传播方向改变了                 。

You check in the fridge for something to eat, but you are out of food. Time to go shopping . But where’s a pencil for the shopping list? Luckily, there’s a gadget that will let you dictate it.

Hit a button on the SmartShopper and say what you need in to its built-recognition software will turn your words into text.

SmartShopper recognizes 2,500 item names and common errands (including “dry cleaners” and “post office”), and lets you add items of your own. It also shows each new entry so you can correct it if it is wrong.

When you are going out to shop, it prints out the list, in alphabetical order. Errands are followed by your list of things to get.

SmartShopper can be set on a table, hung on the wall or magnetically attached to a refrigerator－wherever you are most likely to be when you realize something is running low. Available from www.smartshopperusa.com .The cool new gadget costs $149.95 and comes with three rolls of paper, It also needs four AA batteries.

60.The SmartShopper can _________.

A. help you to remember and make a shopping list

B. go to the post office for you

C. turn all your words into te

D. help you to dry your clothes

61.The new gadget is designed mainly for ________.

A. students   B. housewives   C. managers   D. shop assistants

62.. If you would like to buy a SmartShopper, you can contact at_____.

A. www.smartshopperusa.com       B. four AA batteries

C. the supermarket                D. the post office

试述社会主义民主与社会主义法制的关系。

多发性骨髓瘤是（）。

A.淋巴细胞的恶性肿瘤

B.单核细胞的恶性肿瘤

C.langerhans细胞增生

D.粒细胞的恶性肿瘤

E.浆细胞的恶性肿瘤

资料1

资料2

资料3

根据上述材料，指出下列栏目的正确选项：

“商品名称，规格型号”栏：（）。

A.真空整流器

B.真空整流器 INVAC RECTIFIER

C.真空整流器 INVAC RECTIFIER KBU7K

D.真空整流器 KBU7K