问题 单项选择题

下列有关窦房结的描述,不正确的是()

A.是心脏正常窦性心律的起搏点

B.位于上腔静脉人口与右心房后壁的交界处

C.长10~20mm,宽2~3mm

D.冲动在P细胞形成后,通过T细胞传导至窦房结以外的心房组织

E.窦房结动脉起源于右冠状动脉者占40%,起源于左冠状动脉回旋支者占60%

答案

参考答案:E

单项选择题
阅读理解

High school graduation is indeed important for the person concerned. It is usually marked by a party where friends and family present the person with gifts as a celebration. Below are some good choices for those who will go to college.

You can buy a folding bike. It is a good choice for a high school graduate going to college who may not have room to store a traditional bike. He or she will love moving around the school. It can be easily folded and carried, which would be great for those who often trip back home on weekends. You can also buy a Walkman. It is not expensive. The person can enjoy music while walking, exercising or studying. It can help improve one’s mood.

College is an important time for a person’s career. Many high school graduates know little about the fields they will enter. So why not buy the person a book on what to expect in college life? That way the person would be fully prepared for college. Also he or she can tell something about it to his or her classmates. It is a reality that knowledge is something that cannot be taken away. Healthy food is a major issue in college. Some students have to put up with the bad-taste food in the college dining hall. A refrigerator which can keep food fresh is an excellent choice.

In short, there are so many you can choose from as high school graduation gifts. So what gift are you planning to give to the bright young person?

小题1:Why is a folding bike a good gift?_______

A.Because it is convenient and takes up little space.

B.Because it can help students save more time.

C.Because it is environmentally friendly and cheap.

D.Because it is much lighter than traditional bikes.小题2:How many great choices are mentioned in the text?________

A.3.

B.4.

C.5.

D.6.小题3:Gifts for people who will go to college should be     .

A.useful

B.cheap

C.lovely

D.fashionable小题4:What’s the text mainly about?_________

A.How to celebrate high school graduation.

B.How to make college life easy.

C.What a good gift means to high school graduates.

D.What to buy for people who will go to college.