材料试验机试验前要根据试样的直径d和公称抗拉强度b选择合适的吨位（表盘），若d=1

下列哪项不是天然来源产生的本底（）。

A.其他实验使用的放射源

B.建材放射性

C.宇宙辐射

D.室内空气

E.探测器本身的放射性

由于自然地理条件不同，全球各个地方的气候类型是不一样的，有的地方冬暖夏凉四季如春，有的地方却冬寒夏热四季分明，有的地方缺水干旱，有的地方潮湿多雨。我国的北京和上海分别属于______。

A.温带季风气候和温带海洋性气候 

B.温带季风气候和亚热带季风气候 

C.温带大陆性气候和亚热带海洋性气候 

D.温带海洋性气候和亚热带季风气候

患者男性，40岁，双手指端遇冷后苍白，麻木、疼痛，间断发作6年，每次发作约持续15～30分钟不等，近半年来出现手指、手背肿胀逐渐向前臂扩散，皮肤光亮、发硬，不易提起而来诊。体检：心肺（-）肝脾未触及，化验：ESR50mm／小时，抗核抗体（+）

本例最可能的诊断是（）

A.雷诺病

B.系统性硬化病

C.系统性红斑狼疮

D.干燥综合征

E.皮肌炎

以下（）人员可办理预约信息查询.

A.网点柜员

B.综合柜员

C.支局长

D.营销员

Personal computers are used by one person at a time. The largest personal computer, or PCS, can fit on a (1) . Some of these (2) have more than one microprocessor. (3) the primary processor, which is a general-purpose device, a PC may have one or more processors to (4) special kinds of work. Some machines, (5) , have maths processors, others have graphics processors to help process photographs and other illustrations. Still others have (6) processors.
Office workers also use PCS that are not (7) to a network. These machines are used for (8) tasks as word processing, performing financial calculations, and organizing and (9) bodies of information called databases. People use PCS at (10) for some of the same kinds of tasks. They use word processing programs for (11) Communication, financial software for household budgets. Individuals also use their home computers to play (12) and to communicate (13) the internet.
Small, portable PCS are (14) with people who often work away from their desks. The (15) include laptop computers, which can be (16) on the lap; notebook computers, which are about the (17) of a loose leaf notebook; and palmtop, or handheld computers, which can be operated while (18) in the hand. Laptop and notebook computers have the same (19) as desktop computers. Palmtop computers have less power but still (20) some advanced capabilities. For example, they can process household financial data.

二、完形填空

A．sorting

B．dividing

C．to arrange

D．to separate