以下关于全冠牙体预备的说法中，正确的是（） A.要去除腐质 B.要消除轴壁倒凹 C.

Reading comprehension

       Potatoes are very popular today. But in the past this was not true. Potatoes grew in South America 5,000 years ago. But they only became popular in other places 200 years ago.

       In the 16th century, the Spanish took the potato from South America to Europe. But the people

didn't like this strange vegetable. Some people thought that their skins would look like the skin of the

plant if they ate the potato. So they only ate the leaves. This made them sick because there is poison

(毒药) in the leaves.

       In the 1800s, people started to eat potatoes. Potatoes became the main food in Ireland. Then

something unlucky happened. In 1845, a disease killed all the potatoes in Ireland. Two million people

died of hunger.

       Today each country has its potato dish. Germans eat potato salad, and the USA has the baked

potato. Of course, the French invented French fries.

Fill in the blanks according to the passage. Only one word for each blank.

       Potatoes were   1   in South America 5,000 years ago. But they weren't popular in other places   2 

 200 years ago. In the 16th century, the Spanish took them to Europe. They ate leaves   3   of having

potatoes. As a result, people were badly ill because of the poison in the leaves. In the 1800s, people

started to eat potatoes.  4   , there was something wrong with the potatoes. Two million people died

because of the shortage (缺少) of potatoes in 1845. But now there are many   5   of potato dishes in

the world.

在针灸治疗消渴的处方中，下消证可选穴（）.

A.太渊

B.内庭

C.复溜

D.大椎

E.天枢

The hospital is new _____ very dirty.

A．and

B．or

C．so

D．but

妊娠不足28周而终止者称为流产

主题数据库可以从根本上改变那种以 【18】 为目的的数据库建立的方式。