挤压机齿轮润滑油系统温度低于()时,启动加热器,高于()时,润滑油泵跳车。
A、38℃、75℃
B、18℃、55℃
C、38℃、55℃
D、18℃、75℃
参考答案:B
用所给单词的正确形式填空。
1. ____________ (listen) to me carefully please.
2. ____________ (be) you ready for a quiz?
3. What ____________ the cloud ____________ (look) like?
4. What ____________ (be) they ____________ (do) now? They ____________ (skip).
5. Where ____________ Jenny ____________ (go) this summer? She ____________ (go) to the ocean.