若液压泵出口串联两个调整压力分别为3MPa和7Mpa的溢流阀,则泵的出口压力为()Mpa;
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科学对待人生环境需要我们( )
A. 协调人与自然的关系
B. 协调个人与社会的关系
C. 协调个人与他人的关系
D. 协调自我身心关系
The Chinese New Year seems to have lost its attraction as an important _____ of the year.
A. accident
B. incident
C. event
D. occurrence
I’m tired of this _____ job of answering phones and ordering takeout food. I need some excitement.
A. routine
B. practical
C. smart
D. easy
She hurried away as soon as she received a _____ from her husband.
A. massage
B. message
C. messages
D. massages