[单选题]（ ）的专变采集终端工作参数的设置（除部分通信参数外）、功能调试必须采用由主站运行人员下发，现场维护人员核对的方式。
A.不带控制功能
B.带控制功能
C.RS-485通信
D.载波通信

Passage Four
"Family" is of course an elastic word. But when British people say that their society is based on family life, they are thinking of "family" in its narrow, peculiarly European sense of mother, father and children living together alone in their own house as an economic and social unit. Thus, every British marriage indicates the beginning of a new and independent family-hence the tremendous importance of marriage in British life.
For both the man and the woman, marriage means leaving one’s parents and starting one’s own life. The man’s first duty will then be to his wife, and the wife’s to her husband. He will be entirely responsible for her financial support, and she for the running of the new home. Their children will be their common responsibility and theirs alone. Neither the wife’s parents nor the husband’s, nor their brothers or sisters, aunts or uncles, have any right to int
A. It is the best book on marriage.
B. It is a handbook of marriage.
C. It gives quite some ideas of English social life in the past.
D. It provides a lot of information of former time wealthy families.