Although interior design has existed since the beginning of architecture, its development into a specialized field is really quite recent. Interior designers have become important partly because of the many functions that might be (51) in a single large building.

The importance of interior design becomes (52) when we realize how much time we (53) surrounded by four walls. Whenever we need to be indoors, we want our surroundings to be (54) attractive and comfortable as possible. We also expect (55) place to be appropriate to its use. You would be (56) if the inside of your bedroom were suddenly changed to look (57) the inside of a restaurant. And you wouldn’t feel (58) in a business office that has the appearance of a school.

It soon becomes clear that the interior designer’s most important basic (59) is the function of the particular (60) .

57().

A.like 

B.for 

C.at 

D.into

药物的半数致死量(LD50)是指：

A．抗寄生虫药杀死一半寄生虫的剂量
B．致死半数动物的剂量
C．抗生素杀死一半细菌的剂量
D．产生严重副反应的剂量
E．致死量的一半