采用高效汽提技术，降低催化剂含炭量，（）剂油比，达到减少结焦的目的。
A、降低
B、保持
C、提高
D、无法确定
参考答案：C
吊钩开口度比原尺寸增加（）应报废。
A、15%
B、10%
翻译短语。根据汉语提示，用词组的正确形式填空。
1. How can we ________ _________ (对待) the problems?
2. His motorbike didn't ________ ________ (减慢), so he knocked into a tree nearby and hurt himself.
3. ________ ________ (开头) he didn't like riding bikes but now he is used to it.
4. If you don't listen carefully in class, you can't ________ ________ with (想出) the answers to the
teacher's question.
5. Let's ________ ________ (上演) a short play to raise money for the school, shall we?
