下列关于汇票的说法，表述不正确的是（） A．商业承兑汇票属于商业汇票  B．商业汇票

Weddings in the United States vary as much as the people do. There are church weddings with a great deal of fanfare（仪式上用的短曲）; there are weddings on mountain-tops with guests barefooted (赤脚的); and there have been weddings on the ocean floor with oxygen tanks for the guests. But many weddings, no matter where or how they are performed, include certain traditional customs.

Before a couple is married, they become engaged. And then invitations are sent to those who live nearby, their close friends and their relatives who live far away. When everything is ready, then comes the most exciting moment.

The wedding itself usually lasts between 20 and 40 minutes. The wedding party enters the church while the wedding march is played. The bride carrying a bouquet （花束）enters last with her father who will "give her away ". The bridegroom enters the church from a side door. When the wedding party is gathered by the altar, the bride and bridegroom exchange vows (誓言). It is traditional to use the words "To have and to hold from this day forward, for better, for worse, for richer, for poorer, in sickness and in health, to love and to cherish, till death do us part ". Following the vows, the couple exchange rings. Wearing the wedding ring on the fourth finger of the left hand is an old custom.

After the ceremony there is often a party, called a "reception" which gives the wedding guests an opportunity to congratulate the new couple . The car in which the couple leaves the church is decorated with balloons, streamers and shaving cream. The words "Just Married" are painted on the trunk or back window. The bride and bridegroom run to the car under a shower of rice thrown by the wedding guests. When the couple drives away from the church, friends often chase them in cars, honking (鸣汽车喇叭)and drawing attention to them. And then the couple go on their honeymoon.

小题1:This passage is written mainly to let us know something about _______ .

A．health and lifestyle

B．science and technology

C．culture and custom

D．education and entertainment小题2:Why do the wedding guests throw a lot of rice at the bride and bridegroom when they run to the car ?

A．To wish them good luck .

B．To make fun of them.

C．Not mentioned .

D．To draw attention to them .小题3:Which of the following is TRUE of American weddings ?

A．They are always held in churches whoever they are .

B．The bride’s father is usually present to lead his daughter to the bridegroom and give her to him .

C．Only bridegrooms send rings to brides .

D．Brides needn’t make vows before bridegrooms .小题4:Which of the following is the correct order in which the following events happen ?

a. sending invitation           b. going on honeymoon

c. attending the wedding        d. giving a reception

e. getting engaged

A．e-b-c-d-a

B．e-c-d-a-b

C．b-c-d-a-e

D．e-a-c-d-b

短周期元素X、Y、Z的原子序数依次递增，其原子的最外层电子数之和为13。X与Y、Z位于相邻周期，Z原子最外层电子数是X原子内层电子数的3倍或者是Y原子最外层电子数的3倍。下列说法正确的是 [ ]

A．Z元素形成的某种氧化物能使品红溶液褪色

B．X和Z的最高价氧化物对应的水化物都是弱酸

C．X与Y元素形成的化合物的相对分子质量是100 g/mol

D．Y元素形成的单质能在氧气中燃烧但不能在二氧化碳中燃烧

关于溶血性贫血的定义，哪一项是正确的（）

A.红细胞破坏增加

B.红细胞寿命缩短

C.骨髓造血功能亢进

D.红细胞破坏增加，骨髓能代偿

E.红细胞破坏增加，超过骨髓代偿能力

设置默认路由为192.168.1.1的命令是（）。

A.routeadd192.168.1.1

B.routeadddefaultgw192.168.1.1

C.routeaddgw192.168.1.1

D.routeadddefault192.168.1.1

反渗透的压力容器材质是（）。