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问题
问答题 简答题
设备在运转中轴承温度过高的原因有哪些？
答案
参考答案：
①轴承装配不良
②润滑油选择的牌号不正确
③润滑系统不清洁
④润滑油量不合适
填空题
看图完成句子。
1.
This is a _____________.
2.
These are _____________.
3.
They are young _____________.
4.
Theae are young _____________.
5.
Here are four _____________.
6.
This is _____________.
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判断题
鱼类食品有一定防治动脉粥样硬化的作用，是因为含有多不饱和脂肪酸。
查看答案
This is a _____________. 
These are _____________.
They are young _____________.
Theae are young _____________.
Here are four _____________.
This is _____________.