边缘性前置胎盘的声像图特点是（） A.胎盘下缘部分覆盖子宫颈内口 B.胎盘完全将子宫

依次填写关联词语都正确的一项是[ ]

　　_______是需要用药物来补充营养，__________一定要接受医生的指导，________严格掌握因缺而补，缺什么补什么的原则，不能盲目，不能滥补。  

A．因为　所以　因此  

B．如果　就　所以   

C．即使　也　并且   

D．只要　就　但是

Most taxpayers have had enough income tax collected by their employers during the year. So they do not (36) any money. In fact, most Americans get some money back. Last year, the Internal Revenue Service returned at least some money to more than (37) Americans paying individual income tax.
The United States has what is called (38) . Tax rates increase as (39) increase. This year, people earning more than (40) are taxed at the highest rate.
Earnings above that amount are taxed at (41) . Earnings below that amount are taxed at lower rates.
Individuals who earn less than (42) pay no income tax. But they do pay (43) , Medicare and other taxes.
There are many different ways for people and businesses to reduce their (44) Most homeowners, for example, can reduce their taxes a little by reporting to the I.R.S. the interest they pay (45) . This is called a (46)
In 2004, personal income taxes provided the government with most of its money: (47) of the budget. Social security and other (48) taxes provided (49) . Other forms of income include (50) , money borrowed to (51) and special taxes on (52) .
But income from taxes did not provide enough to pay for government spending. The I.R.S. says the budget deficit for 2004 was about (53) dollars.
Preparing tax documents can be complex. The I.R.S. estimates that taxpayers need an average of about 13 hours to prepare tax documents. And that is just for the basic tax form. For business, the I.R.S. estimates an (54) needs more than 50 hours. This is why a lot of Americans pay (55) to complete their tax documents for them.

一般资料：求助者，女性，32岁，大学教师。 案例介绍：求助者聪明漂亮，科研能力强，工作勤奋，人际关系好，深受领导和同事的好评。求助者与丈夫是大学同学，夫妻感情融洽。一年前，求助者生下女儿，求助者的母亲前来照顾，一家其乐融融。半年前，在单位的职称评定过程中，求助者因生孩子休产假，导致其与同事相比，在工作量和科研成果方面没有优势，而未评上副教授职称。这件事让求助者觉得自己的能力和努力没有得到领导和同事的肯定，心里很不是滋味。近三个月来，求助者心里烦躁，并且看什么都不顺眼，认为丈夫不理解她，经常和丈夫吵架，对母亲乱发脾气，乱扔家里的东西，甚至对女儿也疏于照顾。求助者以前经常召集同学聚会，现在却常找各种理由回避聚会，工作效率也明显降低。求助者因最近出现胸闷、头晕、食欲下降、全身乏力、入睡困难等症状，而主动前来咨询。 心理咨询师观察了解到的情况：求助者自幼学习成绩优异，个性好强，追求完美。

在本案例中恰当的咨询目标包括（）。

A.改善情绪 

B.让丈夫理解自己 

C.评上职称 

D.提高工作效率

下图甲为植物体内与能量代谢有关的生理过程图解，图乙表示在不同条件下，绿色植物光合速率的变化曲线，请据图作答：

比较图乙中①、②、③三条曲线，可见在O～C段光合速率基本相同，其原因是

奥南发电机无负荷情况下的自输出电压和频率基本为（）。

A、110V、50Hz

B、115V、60Hz

C、220V、50Hz

D、220V、60Hz