习惯上讲，当一个地区老年人口比例达到7%以上时，说明该地区已经进入老龄化社会，从

There are two types of people in the world．Although they have equal degree of health and wealth and other comforts of life, one becomes happy and the other becomes unhappy．This is because of the different ways in which they consider things, persons, events and the resulting effects upon their minds．

People who are to be happy pay their attention to the good side of things: the pleasant parts of conversation, the well prepared dishes, the goodness of the wine and the fine weather．They enjoy all the cheerful things．Those who are to be unhappy think and speak only of the opposite things．Therefore, they are continually dissatisfied．By their remarks, they sour the pleasure of society, hurt many people, and make themselves disagreeable everywhere．The habit may be strong, but it may be cured when those who have it realize its bad effects on their interests and tastes．I hope this little warning may help them change this habit．

Although in fact it is chiefly an act of the imagination, it has serious results in life since it brings on deep sorrow and bad luck．Nobody loves them, and no one treats them with more than the most common politeness and respect.This frequently puts them in bad temper and draws them into arguments．they should change their bad habits .If they do not, it will be good for others to avoid any contact with them．Otherwise, it can be disagreeable and sometimes very inconvenient, especially when one becomes mixed up in their quarrels．

小题1:People who are unhappy _______．

A．always consider things differently from others

B．usually are affected by the results of certain things

C．usually misunderstand what others think or say

D．always discover the unpleasant side of certain things小题2:We can conclude from the passage that _______

A．we should pity all such unhappy people

B．such unhappy people are dangerous to social life

C．people can get rid of the habit of unhappiness

D．unhappy people can not understand happy persons小题3:If such unhappy persons insist on keeping the habit, the author suggests that people should ____

A．prevent any communication with them

B．show no respect and politeness to them

C．persuade them to recognize the bad effects

D．quarrel with them until they realize the mistakes

糖尿病酮症酸中毒时，补碱纠正酸碱平衡紊乱，下面哪项原则是正确的（）

A.一旦pH值下降就应该补碱

B.有循环衰竭而pH值降至7.2以下时应补碱

C.轻、中度酸中毒不须补碱，只有当pH值降至7.1以下时才补碱

D.经补碱pH值升至7.2时应停止补碱

E.补碱常用1.25%的碳酸氢钠

患儿，4岁，证见形体消瘦，面色萎黄，肚腹膨胀，易激动，舌苔微腻，脉滑应诊断为

A．疳气
B．疳积
C．疳干
D．疳证
E．脾疳

若发包人未按合同约定预付工程款，承包人应在预付时间到期后( )d内向发包人发出要求预付的通知。

A．7
B．10
C．14
D．15

DSC呼叫系列中电文项是（）

A.菜单选择

B.人工键入

C.菜单选择或人工键入

D.无此项