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【单选题】
Read the following summaries of the original text and decide which one retains the main idea with vocabulary and structure changed. "Art does not evolve by itself. The ideas of people change, and art changes in order to express these ideas. If an artist changes his way of expressing himself, it means that his way of thinking and seeing reality has changed.If the change is consistent with the changing ideas of his time, then his work has improved; if not, then it has deteriorated or failed.A.
Art develops with the passage of time. Therefore artists should adapt their work.
B.
If the artists' work is consistent with the changing ideas of people in their time, their work has been welcomed.
C.
An artist's work will be accepted only if it expresses the changing ideas of his society.
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【简答题】溶胶 - 凝胶法利用金属无机盐的水解 - 缩聚反应中溶胶的形成可以通过 和 两种方法获得。
【单选题】非机动车应当在( )停放,未设停放地点的,应停放在( )
A.
规定地点，不妨碍其他车辆和行人通行的地点
B.
规定地点，不妨碍其他车辆和行人通行的路边
C.
规定地点，人行道上
D.
规定地点，非机动车道上