效率是（）之比。 A.功与时间 B.功率与总功 C.有用功与总功 D.有用功与时间

关于膀胱 * * 瘘，下列错误的是（）

A.有尿液不自主流出，属于尿失禁的范畴

B.主要病因有难产、盆腔手术、肿瘤放疗及恶性肿瘤侵袭

C.术后数天发现的尿瘘应延迟3个月以上再行修补手术

D.如瘘管较小，留置导尿3～6周有可能自行愈合

E.膀胱 * * 瘘术前可在 * * 中局部使用雌激素，以提高手术成功率

随机抽查某年某市市区1000名男孩出生体重(kg)，得均数等于3.3kg，标准差等于0.5kg，则估计这1000名男孩中出生体重不超过3.3kg-1.64×0.5kg的人数约为

A．50

B．100

C．200

D．250

E．300

阅读理解。

     All you need to participate in(参加) home exchange is a house! You don't need to compare values of

the houses or search for a swapping (交换) partner in the case of a home similar to yours. It just requires

identifying a home where you and your family can stay comfortably in the place you wish to visit. You

need to search for a person or a family with whom you would be comfortable exchanging your home

with, for a short period of time. In home exchange, you would be taking care of other people's home,as

well as enjoying the country while they would be doing the same from your home.

     People who have traveled a lot would know that the most expensive part of traveling is paying hotel

bills. In many cases, vacations cannot last for long mainly because of the high accommodation (住房)

expenses. Holiday home exchange is one of the most simple and intelligent ways to cut down an

accommodation expenses. It is an equal trade for both the families and enables both to enjoy the

advantages of a home while traveling to another country.

     Home exchanges have become very popular in major cities in the United Kingdom as it allows you to

benefit from time-share. Mostly, people participating in home exchanges prefer to involve their friends or

neighbors to entertain their visitors, by providing the home exchange visitors with information regarding

the local sightseeing attractions. Many families with children try to swap houses with families who have

children of the similar age group. It saves time and energy that are often wasted in carrying around a

number of toys and equipment. The individual (单个的) traveler often finds house swapping a great way

of relaxing in the comforts of a home after a tiring day of sightseeing and can spend more time to get to

know the area better.

1. The most suitable title for the passage is _________.

A. Home Exchange for Your Holiday            

B. How to Find the Best House

C. Everyone Loves Exchanging Homes          

D. Tips for Your Trip

2. If you take part in home exchanges, you_______

A. should find a home that is similar to yours  

B. should compare your partner's home to yours

C. should take care of other people's home    

D. should prepare food for other families

3. What's the main reason for people exchanging homes during the holiday?

A. To experience other people's lifestyles.

B. To get to know new neighbors and make new friends.

C. To avoid paying expensive hotel bills while traveling

D. To get more information from locals.

4. We can learn from the last paragraph that________.

A. more families prefer to exchange homes than individual travelers

B. families with kids are more likely to exchange homes with families with kids

C. it is difficult for individual travelers to find partners to exchange their homes

D. the individual travelers love to introduce their friends and neighbors to the visitors

人寿保险的险种不包括______。

A．死亡保险
B．生存保险
C．两全保险
D．人身意外伤害保险