下载站场在下载过程中,造成质量流量计前后压差过大的原因是()。
A.下载调节阀开度过小
B.下载罐液位过高
C.下载流量过大
D.下载线过滤器堵塞
参考答案:C
女性,23岁,近日来午后低热、咳嗽。X线胸片示右上肺第一肋间有浸润性小片状阴影。体检时最有可能发现()。
A.病变部位叩诊呈浊音
B.咳嗽后可听到湿性啰音
C.多无异常所见
D.患侧呼吸音减弱
E.可听到支气管肺泡呼吸音
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.table
B.bench
C.desktop
D.chair