2020年军队职称英语考试理工类A级词汇基础练习题(2)

1 Fine freshwater pearls are found in the main stream and the tributaries of the Mississippi River.

　　A banks

　　B deltas

　　C branches

　　D currents

　　2 The flower bud of a water lily opens at sunset since its opening is triggeredby the decreased light.

　　A alleviated

　　B endured

　　C set off

　　D covered up

　　3 Tryouts for community orchestras are frequently judged by committees.

　　A Advertisements

　　B Auditions

　　C Performances

　　D Novelties

　　4 A turbulent storm was a major factor in the defeat of the Spanish Armada.

　　A noxious

　　B violent

　　C mysterious

　　D pathetic

　　5 Light rays are turned aside by the intense gravitational field surrounding a black hole.

　　A heightened

　　B deflected

　　C rotated

　　D created