千万别弄错！山西省自考教师资格证后资格认证需要带齐这些材料！

下列叙述正确的是

A．经常运行的计算机程度会自动产生计算机病毒

B．计算机病毒会传染到计算机的使用者

C．计算机病毒可以把自身复制到计算机的硬盘

D．计算机病毒不会将自身复制到内存

汇率从外汇业务与外汇管理角度分析，可分为 ( )

A．固定汇率和浮动汇率

B．基础汇率和套算汇率

C．即期汇率和远期汇率

D．买入汇率和卖出汇率

E．官方利率和市场利率

As the plane circled over the airport，everyone sensed that something was wrong. The plane was moving unsteadily through the air，and although the passengers had (11) their seat belts，they were suddenly (12) forward. At that moment，the air-hostess appeared. She looked very pale，but was quite calm. (13) quickly but almost in a whisper，she informed everyone that the pilot had fainted and asked (14) any of the passengers knew anything about machines or at least how to drive a car. (15) a moment's hesitation，a man got up and followed the stewardess(空中小姐)into the pilot's cabin.

Moving the pilot aside. the man took (16) and listened carefully to the urgent instructions that were being sent by radio from the airport (17) . The plane was now dangerously close to the ground，but to everyone's relief，it soon began to climb. The man (18) circle the airport several times in order to become familiar with the controls.

Following instructions，the man guided plane towards the airfield. It shook (19) as it touched the ground and then moved rapidly across the field，but after a long run it stopped safely. Outside，a crowd of people who (20) anxiously，rushed forward to congratulate the“pilot”on a perfect landing.

A. installed

B. fastened

C. connected

D. held

简述我国《反不正当竞争法》所规制的不正当竞争行为的类型。