单选题：No sooner had we sat down__________ we found it was time to

题目内容：

No sooner had we sat down__________ we found it was time to go． A．than
B．when
C．as
D．while

参考答案：

答案解析：

Living things are__________ cells，and cells do not grow to m

Living things are__________ cells，and cells do not grow to more than twice the s

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按照皮亚杰的认知发展分期的理论，7～11岁儿童处于（　　） A．感觉运动阶段 B．思维准备阶段 C．思维阶段 D．抽象思维阶段

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