按照《机电产品招标投标实施办法》规定，可以不进行国际招标的情形有( )。 A．国外

B Customs of Bulgaria: Marriage and Family保加利亚习俗：婚姻与家庭
The average age for women to marry is between 18 and 25.25 tend to (1) when somewhat older. A church wedding often (2) the legal civil ceremony, and a large reception, which often involves (3) music and dancing, is held in the evening. Wedding traditions include (4) money on the bride’s dress to represent future prosperity, the groom (5) the bride at her home, and the couple pulling on opposite (6) of a loaf of bread—whoever gets the largest piece will be (7) boss of the family. Honeymoons are a new tradition.
The principle (8) mutual support is valued in the Bulgarian family. The elderly are (9) cared for by their adult children. Unmarried adults live with their (10) and many newly married couples live with one set of parents (11) they are able to get housing of their own. Most families (12) urban areas live in apartments, which are in short
supply, while (13) in rural areas usually have their own houses. Many village houses (14) owned by families who live in urban areas, who use them_ (15) summer and weekend retreats, or for retired parents.
Most families in (16) areas do not have more than two children, while families in (17) areas tend to be larger. Grandparents play an important role in (18) care, particularly in urban areas, where most women work outside the (19) . Men of the younger generation have begun to help with household (20) , once considered only women’s responsibility.

如何让幼儿喜欢并适应群体生活。

综合布线系统中，NVP是指电缆的（）。

A、回波损耗

B、远端串扰

C、近端串扰

D、额定传输速率

夜间——白色灯光左右小摇动，为（）信号。

A.指挥机车向显示人方向稍行移动

B.溜放

C.指挥机车向显示人反方向稍行移动

D.停留车位置

闪蒸气压缩机跳车，有什么后果，如何处理？