术后并发甲状腺危象的主要原因是
A．术前准备不充分B．术中出血过多C．甲状腺切除过少D．术后未服碘剂E．精神过度紧张
参考答案：A
用所给词的适当形式填空.
1. The people here are very ________ (friend) to us.
2. This coat is too small, please ________ (give) a large one to me.
3. Jim ________ (not has) to get up early tomorrow morning.
4. ________ he ________ (write) a letter now?
5. ________ (not open) the door, please .
简述戴尔“经验之塔”理论。
