有关睾丸鞘膜积液，不正确的说法是（）。 A.多为卵圆形，无触痛 B.睾丸和附睾触摸不

以下措施可以提高全口义齿固位和稳定，除了（）

A.尽量扩大基托面积

B.准确的印模

C.有利的磨光面形态

D.合理的排牙

E.指导患者使用义齿

官腔注入法适宜的时间为月经干净后第 ( )

A．2～3天

B．3～5天

C．3～7天

D．5～7天

E．5～9天

生态学

Water is (41) important of all the things we (42) and drink. Not many people understand this, (43) it’s quite true. The human body (人体) can go (44) food for a long time, but two (45) three days without water can usually (46) people die.
Many people don’ t understand how much water the human body needs to work well and many people do not drink (47) , even (48) hot weather.
Our body is (49) water, about 65% to 75%, ff we do not have enough water, we’ll (50) tired and many will get ill. So you see, how important water is to us all.

[A] with [B] out [C] without

我国产业结构优化升级的方向是（）

A.高新技术产业为先导

B.基础产业和制造业为支撑

C.服务业全面发展

D.高新技术产业和制造业为支撑

E.第一、二、三产业全面发展