法律的强制实施都是通过法定时间与法定空间上的步骤和方式而得以进行的，此即所谓____

Read and judge.（阅读理解，在正确的句子前面打“√”，不正确的打“×”）

Dear Aunt.

     Thank you for the new skirt. It's pretty. It's too hot in Beijing. I can wear my T-shirt with the skirt.  

Many places of China are hot, too.  What's the weather like in Canada? Is it warm?

                                                                                                                                               Love,

                                                                                                                                               Amy

( )1. Amy likes the new skirt.

(     )2. It's hot in Beijing.

(     )3. It's cold in many places 'in China.

(     )4. Amy's aunt is in USA.

慢性肺心病心衰时，以下哪项是右心扩大的体征（）

A.肝大

B.双下肢水肿

C.P₂>A₂

D.双侧胸腔积液

E.剑突下抬举样搏动

外径为0.426m的蒸汽管道，其外包上一层厚度为0.200m的保温层，保温层材料的导热系数为0.50W/（m.℃）。若蒸汽管道与保温层交界面处温度为180℃，保温层的外表面温度为40℃，假定层间接触良好。则每米管长的热损约为（）W/m。

A、780

B、664

C、540

D、600

X理论-Y理论围绕（）来论述人类行为规律及其对管理的影响。

A.生产的本质

B.社会的本质

C.人的本性

D.企业的本质