根据现金的来源不同，现金流量分为如下（）几种。 A.经营活动产生的现金流量 B.投资

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写相应位置上。

The most influential book in my life

The Story of My Life by Helen Keller is the most influential book in my life. It __1__ (fill) with courage, struggle and faith throughout. Helen Keller was once in deep despair in her __2__ (child), but finally she decided to overcome her physical defects and live happily. Furthermore, she showed great patience, ___3___ (do) well in her long and hard learning period.

I have learned, above all, three lessons from her story. First, she taught me that often the road to success is to face hardships ___4____ (brave). Maybe you are born under an ill star yet you can stand a better chance ___5___ others. It is therefore important that you screw up your courage ____6____courage is needed. Second, the impairment of part of her senses did not prevent ___7___ from learning. On the contrary, she ___8___ (make) continual efforts to go deeper into the realm of knowledge her fortitude had thus helped her overcome many handicaps. ___9___, she advised that we should make the most of our sense-organs as if we ___10___ (lose) them soon because this way we would observe the world more carefully than ever before.

下列计算中，错误的有①（3a+4）（3a﹣4）=9a²﹣4；②（2a²﹣b）（2a²+b）=4a²﹣b²； ③（3﹣x）（x+3）=x²﹣9；④（﹣x+y）（x+y）=﹣（x﹣y）（x+y）=﹣x²﹣y²．[ ]

A．1个

B．2个

C．3个

D．4个

甲亢患者甲状腺手术后发生甲状腺危象的主要原因是（）。

A.患者精神紧张

B.术后创口出血

C.术后创口感染

D.围手术期补液不足

E.术前药物准备不充分

创建示范终端站点的基本要求是什么？

也有发达国家2.国际依附理论认为：在现有的国际政治经济秩序下，发达国家处于中心支配的地位，发展中国家处于被支配的边缘地位。中心国家与边缘国家通过市场进行平等的交换。