砌体结构工程施工质量验收规范（GB50203-2011）：砖砌的灰缝应横平竖直，厚薄

All over the world people enjoy sports. Sports help to keep people healthy and happy, and to live longer.

  小题1:   They buy tickets or turn on their TVs to watch the games. Often they get very excited when their player or team wins.

  小题2:   Football, for example, has spread around the world. Swimming is popular in all countries near the sea or in those with many rivers. What fun it is to jump into a pool or lake, whether in China, Egypt or Italy!    小题3:   Think how many lovers to skate or ski in Japan, Norway or Canada.

Some sports or game go back thousands of years, like running or jumping. Chinese wushu, for example, has a very long history. But basketball and volleyball are rather new. Neither one is a hundred years old yet.   小题4:  Water-skiing is one of the newest in the family of sports.

People from different countries may not be able to understand each other, but after a game together they often become good friends.   小题5:   One learns to fight hard but fight fair, to win without pride and to lose with grace.

A．And think of people in cold countries.

B．Sports help to train a person’s character.

C．Not a few people participate in different sports competitions themselves.

D．Many people like to watch others play games.E．People aren’t inventing new sports or games.

F．Some sports are so interesting that people everywhere take part in them.

G．People are inventing new sports or games all the time.

果蝇灰身（B）对黑身（b）为显性，现将纯种灰身果蝇与黑身果蝇杂交，产生的F1代再自交产生F2代，将F2代中所有黑身果蝇除去，让灰身果蝇自由交配，产生F3代。问F3代中灰它的与黑身果蝇的比例是（）

A.3︰1

B.5︰1

C.8︰1

D.9︰1

自动喷水灭火系统系统配水支管上设置吊架的最大间距不宜大于（）m。

A、3.0

B、3.6

C、3.4

D、3.8

45岁女性患者，头痛1月，加重1周，伴间断性呕吐，查体示双眼视 * * 水肿。

为进一步明确诊断及治疗方案，下列辅助检查中最重要的是（）

A.头部CT平扫

B.MRI平扫

C.脑血管造影

D.MRI平扫+强化

E.磁共振血管成像

SBR与NR相比，哪一种更耐热氧老化？