油泵的二级保养是对油泵的局部调整和解体检查，以便发现运转后发生的（）。
A、出口压力不正常
B、温度过高
C、润滑油少
D、局部机件松动
参考答案：D
_____ of the animals is getting _____ because their living areas are becoming farmlands. [ ]
A. A number, large and large
B. A number, larger and larger
C. The number, smaller and smaller
D. The number, small and small
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