获得性中耳胆脂瘤的CT特征性表现为()A．外耳道棘骨质破坏 B．鼓室腔扩大 C．鼓膜

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] mostly[B] almost [C] most

谷类食品中较难消化的成分是（）

A.葡萄糖

B.果糖

C.直链淀粉

D.支链淀粉

E.磷酸

外墙保温层是由保温材料组成，在外保温系统中起保护作用的构造层.

在时间管理中，是不要长时间的做同一种工作，而是要经常的做不同内容的工作，保持精神上的兴奋点，进行主动的调剂和放松，这是（）。

A.放松法

B.模特休息法

C.帕累托原则

D.平衡心态