简述增加税收和增发政府债券对货币供给的影响。

阅读短文，回答问题。

     Betty is an English girl. Now she's in China. She's twelve years old. We live in the same building.

She lives in Room 305 and I live in Room 306. We are about the same age. She likes singing and

dancing.  She dances beautifully.  She sings beautifully, too.  We all like listening to her.  I like

swimming and skating.  In summer I often go swimming with my friends in the swimming pool (游泳

池). I swim very fast and I skate very well, too.

1. Does Betty live in China now?

  _________________________________________________________

2. How old is she?

  _________________________________________________________

3. What's her hobby?

  _________________________________________________________

4. Does she dance beautifully?

  _________________________________________________________

5. Where does the writer go swimming?

  _________________________________________________________

2011年4月11日晚，央视曝光“上海华联超市等销售染色馒头”，商家为了降低成本将柠檬黄用在玉米馒头中着色，山梨酸钾用在馒头中防止馒头发霉，甜蜜素用在馒头中代替蔗糖，甜味素的化学式为C₁₄H₁₈N₂O₅，下列关于甜味素的说法正确的是（　　）

A．甜味素是由碳、氢、氮、氧四个元素组成的

B．其中碳、氢、氮、氧四种元素的质量比为14：18：2：5

C．甜味素分子中共有39个原子核

D．甜味素中碳元素的质量分数最大

有头疽最易发生的部位是（）

A.头部

B.颈部

C.项部

D.腹部

E.胸部

血清型IgA占总Ig的（）

A.5％～10％

B.20％～25％

C.15％～20％

D.[0％～15％

E.1％～5％

富液中常有铁锈等杂质，经过滤后杂质不会继续在系统内循环，可以提高胺液的纯度。