简述脱扣器的工作原理
参考答案:
脱扣器是断路器的感受元件,当电路出现故障时,脱扣器感测到故障信号后,经自由脱扣机构使断路器主触头分断
发现落水者已晚,大型船为尽快驶至落水者:()
A.应采用斯恰诺(Scharnov)旋回
B.应采用威廉逊(Williamson)旋回
C.应采用双旋回
D.应采用单旋回
One day while a girl was walking in the woods she found two starving songbirds. She took them home and put them in a small (16) . She cared for them and felt great love for them. Once the (17) and per of the two birds flew from the cage. Therefore, (18) he flew close, she grasped him (19) . She felt glad, but suddenly she felt the bird go limp. She opened her hand and (20) in horror at the dead bird. She noticed the other bird moving back and forth on the edge of the cage. She could feel his great need for (21) . She lifted him from the cage and (22) him softly into the air. The bird circled once, twice, three times. The girl watched delightedly at the bird’s enjoyment. Her heart was no longer (23) with her loss. Suddenly the bird flew closer and (24) softly on her shoulder. It sang the sweetest melody that she had ever heard. The fastest way to (25) love is to hold on it too tightly, while the best way to keep love is to give it WINGS!
Ⅱ.完型填空/Cloze
A.gently
B.freely
C.elegantly
D.wildly