问题
单项选择题
双波纹管差压计左侧波纹管外侧的波纹管作用是()。
A、填充液温度补偿
B、填充液体积补偿
C、填充液热能补偿
D、填充液压力补偿
答案
参考答案:A
双波纹管差压计左侧波纹管外侧的波纹管作用是()。
A、填充液温度补偿
B、填充液体积补偿
C、填充液热能补偿
D、填充液压力补偿
参考答案:A
完型填空 | ||||
Look! This is a photo of my 1 . These are my 2 . My father is a teacher and my mother is a worker. I have an elder sister. 3 name is Mary. She is fourteen. I am 4 . We are in the same school. My sister likes 5 very much. She has many sports things. She has a tennis racket, three 6 , two basketballs, four ping-pong bats and five ping-pong balls. We often watch basketball games 7 TV on Saturdays. What's my favourite sport? Can you guess? Yes, it's 8 I 9 basketball after school every day. 10 my mother doesn't like basketball. She thinks it's boring. | ||||
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