小于90°的角是锐角，大于90°的角是钝角．______．（判断对错）

某同学从一均匀大岩石上砸下一小块岩石，经测得这块岩石的密度是2.7×10³kg/m³，那么一小块岩石的密度与那一大块岩石的密度____________（选填：相等/不相等）。

以下程序的输出结果是_______。 main() { int i,x[3][3]={9,8,7,6,5,4,3,2,1}，*p=&x[1][1]； for(i=0;i＜4；i+=2)printf("%d",p[i]); }

A．5 2

B．5 1

C．5 3

D．9 7

患者，男，70岁。心前区剧痛3小时，服用硝酸甘油不能缓解。查体：BP90/68mmHg，R32次/分， HR120次/分，律齐，双肺底细小水泡音，心尖部闻及第四心音。急诊心电图V3～V5导联ST段弓背向上抬高，病理性Q波。该患者最可能的诊断是

A．急性前间壁心肌梗死合并心律失常

B．急性前壁心肌梗死合并肺部感染

C．急性前间壁心肌梗死合并休克

D．急性前壁心肌梗死合并心衰

真头痛的临床特点有（）

A.突发剧烈的头痛

B.肢厥抽搐

C.持续不解，阵发加重

D.呕吐如喷

E.起病急骤

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.