已知平面上一点M（5，0），若直线上存在点P，使|PM|=4，则称该直线为“点M

方程组 x+y=1 x-y=-1 的解集是（　　） A．{x=0，y=1} B．{0，1} C．{（0，1）} D．{（1，0）}

有关Creutzfeldt-Jakob（CJD）叙述错误的是（）

A.家族性者占绝大多数

B.脑电图初期为非特异性慢波，以后可出现周期性同步放电

C.脑活检可发现灰质海绵状变性、神经细胞脱失、胶质细胞增生和PrP

D.脑脊液内14-3-3蛋白免疫酶测定阳性

E.进展迅速，起病数周或数月内发展为痴呆、无动性缄默症或去皮质强直

与人打招呼的时候，要怎么做？

There was a woman in Detroit, who had two sons. She was worried about them, especially the younger one, Ben, because he was not doing well in school. Boys in his class played jokes on him because he seemed so (21) The mother (22) that she would help her sons to do (23) in school by herself. She told them to go to the Detroit Public Library to (24) a book a week and do a book report for her.
One day, in Ben’s class, the teacher held up a rock and asked (25) anyone knew it. Ben put up his hand and the teacher let him (26) . "Why did Ben raise his hand" all of his (27) whispered (耳语) and wondered. "He (28) said anything. What could he possibly want to say" To their surprise, Ben not only (29) the rock, but also said a lot about it. He (30) other rocks in its group and even knew (31) the teacher had found it. The teacher and the other students were (32) Ben had learned this from doing one of his book (33) .
Later Ben became the (34) student of his class. When he finished high school, he went to Yale University and (34) became one of the best doctors in the United States.

Ⅱ. 完形填空

/Close
阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中选出一个最佳选项。

A．see

B．find

C．read

D．buy

简述园林中水的基本表现形式。