亏损合同是指履行合同义务不可避免会发生的成本超过预期经济利益的合同。 ( )

用所给单词的适当形式填空。

1. It is __________ (possible) for me to finish the work today. I need another day to do it.

2. This is our new classroom __________ (build). There are eighteen classrooms in it.

3. The famous __________ (science) Qian Suesen died of illness on October 31, 2009.

4. I __________ (think) he could come to my party, but now I know I was wrong.

5. No one taught me. I learnt it all by __________ (my).

初孕妇，26岁。于妊娠34周出现头痛、眼花。血压180/100mmHg，尿蛋白(++)，眼底动静脉比为1:2，视网膜水肿。本例诊断应是

A．中度妊高征
B．先兆子痫
C．子痫
D．妊娠合并原发性高血压
E．妊娠合并肾性高血压

一个物体的速度——时间图象如图如示，则（）

A.物体的速度方向在2s末时改变

B.物体在3s内速度的最大值为4m/s

C.物体在3s内的位移为8m

D.物体在2s内的位移达到最大

企业可以根据企业成本核算的需要，选择恰当的成本计算对象，确定成本计算方法。( )