[单选题]A1098BY 当充入氮气压力超过( )MPa时,充入压力过大,会导致变压器箱体内空气温度骤降,引发微量水蒸气冷凝成水附着在器身上。
A.0.1
B.1
C.5
D.0.5

Well, I feel it is very important for families to have regular meals together. One of my good childhood memories was dinner with my parents and two sisters. Because my husband and I both work and our three children are busy with their studies, we seldom had a chance to get together as a family. But we thought it would be possible for us to sit down and enjoy meals together every week. First we try setting three fixed days: Mondays, Wednesdays, and Fridays. But almost everyone was unhappy. Then my son had the idea that everyone told me his or her most convenient days and I would choose the two best days. For a while, the children were still unhappy with the idea. They said they would rather spend the time with their friends playing sports. Gradually, though, they began to see these evenings together as interesting, and helpful. We loved it a lot. We made plans for trips. We discussed each other’s problems. After a couple of months, anyone who had to miss a family meal felt r
A. They thought it was funny.
B. They disliked the idea at first.
C. They preferred eating with friends.

Who takes care of the elderly in the United States today Many people wrongly believe that when people reach old age, their families place them in nursing homes. They are left there in the hands of strangers for the rest of their lives. Their grown children visit them only occasionally, but more often, they do not have any regular visitors. The truth is that this idea is an unfortunatemyth--a fictitious story. In fact, family members provide over 80 percent of the care that elderly people need.
Samuel H. Preston, a sociologist at the University of Pennsylvania, studied how the American family is changing. He reported that by the time the average American couple reaches 40 years of age, they have more parents than children. This statistic shows the change in life-styles and responsibilities of aging Americans. The average middle-aged couple can look forward to caring for elderly parents some time after their own children have grown up. Moreover, because people today live lo