单项选择题

A. The possible variables.
B. The possible constants.
C. Patterns of change and development.
D. The guaranteed forms of things.
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单项选择题
A. They had old clothes and bikes.B. They had a lot of playmates.C. They learned to cooperate with the entire family.D. They learned to enjoy life without much money.
A. They had old clothes and bikes.
B. They had a lot of playmates.
C. They learned to cooperate with the entire family.
D. They learned to enjoy life without much money.
单项选择题
A. Its founders invented personal computers.B. Its founders invented laptop computers.C. Its founders invented softwares.D. Its founders raised huge fund.
A. Its founders invented personal computers.
B. Its founders invented laptop computers.
C. Its founders invented softwares.
D. Its founders raised huge fund.
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