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7.Graves病出现浸润性突眼时如何保护眼部？

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Directions: Listen to the passage three times and fill in the blanks with the missing words.[音频]My mother was born in a small town in northern Italy. She was three when her parents immigrated to America in 1926. They lived in Chicago when my grandfather worked making ice cream. Mama (1)_in the urban environment. At l6, she graduated first in her high school class, went onto secretarial school, and finally worked as an executive secretary for a railroad company. She was beautiful too. When a local photographer used her pictures in his monthly window display, she felt pleased. Her favorite (2)showed her sitting by Lake Michigan, her hair went blown, her gaze reaching toward the (3). My parents were married in 1944. Dad was a quiet and intelligent man. He was 17 when he left Italy. Soon after, a hit-and-run accident left him with a (4)limp. Dad worked hard selling candy to Chicago office workers (5). He had little formal schooling. His English was self-taught. Yet he (6)built a small successful wholesale candy business. Dad was generous and handsome. Mama was (7)him. After she married, my mother (8)and gave herself to her family. In1950, with three small children, dad moved the family to a farm 40 miles from Chicago. He worked the land and (9)to the city to run his business. Mama said good-bye toher parents and friends, and traded her busy city neighborhood for a more (10)life. But she never complained.

以下关于锁存器和触发器描述正确的是A.锁存器是脉冲边沿敏感器件，触发器是脉冲电平敏感器件B.锁存器和触发器都是脉冲电平敏感器件C.锁存器和触发器都是脉冲边沿敏感器件D.锁存器是脉冲电平敏感器件，触发器是脉冲边沿敏感器件

A
B
C
D

当输入端S和R为，由或非门构成的基本SR锁存器会出现不稳定状态。A.S=1，R=1 B.S=0，R=1 C.S=1，R=0 D.S=0，R=0

A
B
C
D

当输入端S和R为，由或非门构成的基本SR锁存器保持原状态不变。A.S=1，R=1 B.S=0，R=0 C.S=1，R=0 D.S=0，R=1

A
B
C
D