题目内容
当轮子在地面上作纯滚动时，滑动摩擦力作负功。
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Fill in the blanks with the following words.exemplaryanonymousprimemalnourishedhumanitariangenerouscompassionateconscientiousgracious1. Sibyl was the most _________, helpful, and generous person to work with.2. A _____________ teacher may feel inclined to take work home.3. She is always ______________ to the kids.4. I allowed him to go home on ________________ grounds.5. A company with an ____________ record on environmental issues should be encouraged by government.6. According to one employee, who wishes to remain _____________, the company engaged in illegal activities.7. The hotel is in a_________ location overlooking the valley.8. These ______________ children have not enough food to eat.9. _____________ aid is being sent to the refugees.
Fill in the blanks with the following expressions . Change the form when necessary. Each expression can be used only once.embark onturn downlive onshare inlead by example1. She retired from the company where she has _____________ and been a source of encouragement to others.2. All people, whether they be rich or poor, strong or weak, privileged or deprived, are interdependent, and ___________ the common task of seeking to achieve mankind’s full potential.3. Crucially, most of the students are full-time workers who would not otherwise have been able to ____________ sustained further study.4. I would love to have kids. I would ___________ an Oscar to see my boy at a baseball game or my girl at a song recital.5. She hoped Vincent would understand that her life had not been empty, because her love would ________.
使用电流法检测电气故障时，必须断开检修电气线路的电源，以防止触电。
短接法只适合于检查电压降极小的导线和触点之间的断路故障。
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