血小板生成减少的出血性疾病为
A．特发性血小板减少性紫癜B．DICC．脾功能亢进D．再生障碍性贫血E．过敏性紫癜
参考答案：D
用括号中所给单词的适当形式填空。
1. Thank you so much for_______(help)me.
2. 一Where is Tom?
一He _______(water) flowers in the garden.
3. 一Can you help me carry the heavy box?
一Sorry, I_______(wash) my clothes.
4. Look! They______(swim) at the pool.
5. Mike is busy______(write) a book these days.
简述有效应力原理的基本概念。在地基土的最终变形量计算中，土中附加应力是指有效应力还是总应力？
