对于一些有约束条件的系统，都规定有具体的( )。A．最大偏差 B．超调量 C．衰减

HIV-抗体初筛的血清发生溶血时是否对检测值有影响？

糖尿病

阅读理解。

    The more we do a thing, the more we tend to like doing it; and if we do not continue to do it, we feel

uncomfortable. This is called the force of habits, and the force of habits should be fought against.

     Habits, whether good or bad, are gradually formed. When a person does a certain thing, he is driven

by some unseen force to do the same thing repeatedly, then a habit is formed. Once a habit is formed, it

is difficult, and sometimes impossible, to get rid of. It is therefore very important that we should pay great

attention to the formation of habits. Children often form bad habits, some of which remain with them as

long as they live. Older persons also form bad habits as long as they live, and sometimes become ruined

by them.

    There are other habits which, when formed in early life, are of great help. Many successful men say

that much of their success has something to do with certain habits in early life, such as early rising, honesty

and so on. 

    Among the habits which children should not form are laziness, lying, stealing and so on. They are all

easily formed habits. Unfortunately, older persons often form bad habits, which should have been avoided.

    We should keep from all these bad habits, and try to form such habits as will be good for others and

ourselves. Remember: Habits cure habits.

1. _____ are formed little by little.

A. Good habits

B. Bad habits

C. Both good habits and bad habits

D. Neither good habits nor bad habits

2. The underlined word "them" in the first paragraph refers to ______.

A. bad habits

B. good habits 　

C. children

D. other persons.

3. Why should we pay much attention to the formation of habits? 　　

A. Because habits are of great help to every one of us. 　　

B. Because a man can never get rid of a habit. 　　

C. Because it's hard and sometimes even impossible to throw away bad habits.

D. Because we are forced to do them again and again.

4. According to the passage, early rising ________. 　　

A. has something to do with success　　

B. is an easily formed habit 　　

C. is such a habit as should have been avoided

D. is such a habit as will be kept

差压变送器测量范围为0-60Kpa，当输出电流为12mA时，则测量值为（）。

A.10Kpa

B.20Kpa

C.30Kpa

D.60Kpa

以下各项属于国家电网公司各单位外汇套期保值业务的交易前台应履行的职责是（）。

A.按照最终批准的年度外汇套期保值计划和临时外汇套期保值方案，根据市场情况择机执行交易

B.交易完成并确认交易有效后，核对成交明细并将交易确认文档存档

C.编制年度和季度的套期保值执行结果报告

D.对外汇套期保值的工具、期限、交易对手的选择提出风险管理意见