题目内容

Complete the sentences with infinitives or gerunds.1. Do you enjoy ___________ (read) science fiction.2. Cherry suggested ______________ (see) a movie after work.3. Luckily I managed ____________ (find) my way to the hotel.4. Where did you learn _______________ (speak) Spanish? Was it in Spain or in Latin America?5. Do you mind _______________ (help) me translate this letter?6. He asked ________________ (talk) to the store manager.7. I considered __________________(apply)for the job but in the end I decided against it.8. If he keeps ______________ (come) to work late, he’s going to get fired.9. Debbie plans _____________ (study) abroad next year.10. David failed ________________ (pay) his electricity bill.

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立式分离器与卧式分离器不同点是()。

A. 气液界面小,不利于油中气泡的析出
B. 气流上升的路程长,有利于液滴的分出
C. 成本更低
D. 立式分离器占地面积较小

轻烃回收工艺的主要过程就是对天然气进行制冷降温,使较轻的组分冷凝成液体。

A. 对
B. 错

青贮成功的关键条件是

青贮饲料适宜的温度()℃

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