问题
单项选择题
环形防喷器壳体上有上下两个油孔，上油孔进油则（）。
A、封井器打开，下油孔通油箱
B、封井器关闭，下油孔通油箱
C、封井器关闭，上油孔通油箱
D、封井器打开，上油孔通油箱
答案
参考答案：A
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环形防喷器壳体上有上下两个油孔，上油孔进油则（）。
A、封井器打开，下油孔通油箱
B、封井器关闭，下油孔通油箱
C、封井器关闭，上油孔通油箱
D、封井器打开，上油孔通油箱
参考答案：A
Dear Sigmund Friend My name is Simon and I am a Grade 9 student. I am crazy 31 football! I love 32 football, reading about football, and of course, playing football. My dream 33 a great football player. However, my love of football has become a big problem, and I would like your 34 . I have 35 friends, and we always play football together at school or in the park after school. We like staying out late to play football. We often play for three hours or more and forget when to stop. Then I 36 trouble at home because my parents do not allow me to play ou  tside after 6 p.m. I really do not understand why they are so strict. I feel stressed and angry 37 . I believe it is important for us to spend some time on our ho bbies. They can help us relax and make our lives 38 .I wish I could have my parents’ 39 .Is it bad to stay out late to play football? Should I spend less time on it? I really do not know 40 . Can you please advise me how to achieve a balance between my schoolwork and my hobbies? Thanks a lot. Best wishes Simon
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