天然土层在历史上所经受过的包括自重应力和其他荷载作用形成的最大竖向有效固结压力称为（）。
参考答案：先期固结压力（前期固结压力）
宅急送的企业价值观是什么？
按要求变换句型(一空一词,含缩写)。
1. What's the matter with Tom? (给出同义句)
What's _____ _____ Tom?
2. She has a bad cold. (就划线部分提问)
What's_____ _____ her?
3. You should see the dentist. (就划线部分提问)
What _____ I _____ ?
4. He should eat some vegetables and fruit. (变为否定句)
He _____ eat any vegetables _____ fruit.
5. John didn't come to school yesterday because he was ill. (就划线部分提问)
_____ _____ John come to school yesterday?
