建筑施工企业从事建筑施工活动前，应当依照本规定向( )申请领取安全生产许可证。A．

1700多年前，我国数学家______在注解《______》时，更明确地提出了正数和负数的概念．

氟牙症的病理变化是

A．牙本质矿化不良
B．牙釉质矿化不良
C．牙本质表面矿化不足
D．牙釉质表面矿化不足
E．釉牙本质界弧形结构模糊

某工程基础施工中出现了意外情况，导致了工程量由原来的2 800 m³增加到3 500 m³，原定工期是40天，则承包商可以提出的工期索赔值是( )天。

A．5

B．10

C．6

D．8

( )是对我国境内从事资源开发的单位和个人因资源开发条件差异形成的级差而征收的一种税。

A．资源税
B．土地税
C．不动产税
D．遗产税

A 68-year-old woman is admitted to the general surgical unit for removal of a breast mass malignancy. In the presurgical assessment of the client, which of the following choices would be most appropriate for the nurse to ask when assessing her self-concept（）

A. "Let’s talk about what you’d like to do that you haven’t done. "

B. "List for me your accomplishments and achievements in life. "

C. "Tell me how this breast surgery will make you feel about yourself. "

D. "What does your husband say when he compliments you"