共析碳钢加热成为A后，冷却时所形成的组织主要取决于（）。A.A加热时的温度 B.A加

在某珠宝盗窃案件的侦破过程中，查明作案有肯定是A，B，C，D四人中的一个。在审讯时，他们的口供如下：

A：珠宝被盗那天，我在乡下，是不可能作案的；

B：D是罪犯；

C：B才是罪犯，我曾看见他卖过珠宝；

D：B与我有仇，故意诬陷我。

现在知道，四人中只有一人说的是真话。你能分析出谁是罪犯吗?

The Conservative（保守的） Party leader David Cameron has become the British prime minister. The 43-year-old Cameron is the youngest to hold the post in almost 200 years.

Cameron grew up with poor school reports but has become a famous political figure. He is reportedly a descendant（后裔）of King William IV. Cameron studied at the elite（精英的）Eton College. He went to Oxford University, where he graduated with a first-class honors degree in philosophy, politics and economics.

At Eton, Cameron was a problem boy. In 1983, he allegedly（涉嫌） took drugs. He was punished, and ordered to copy 500 lines of Latin text. He later passed the Oxford entrance exam. Now he is British’s prime minister, he has to deal with the country’s deep economic troubles.

46. How old was David Cameron allegedly took drugs?

A.15                          B.16                          C.17                        D.18

47. What can you infer about David Cameron from the text?

A. He is the youngest prime minister in history.     B. He often got high scores at school.

C. He is handsome.                                                         D. He didn’t behave well at Eton.

48. Which was David Cameron’s favorite subject?

A. Internet                   B. biology                        C. politics                    D. maths

49. According to the text, we know that      

A. As a punishment, he copied 50 lines of Latin text.

B. David Cameron passed the Cambridge entrance exam.

C. British has trouble with economy now.

D. David Cameron is a heavy smoker.

不完全强直收缩与完全强直收缩有何区别？

有关眼膏剂的不正确表述是

A．应无刺激性、过敏性

B．常用基质中不含羊毛脂

C．必须在清洁、灭菌的环境下制备

D．应均匀、细腻、易于涂布

E．成品不得检验出金黄色葡萄球菌和绿脓杆菌

目前国内对烧伤面积的估计应用最多的方法是（）。

A.华氏加分法

B.柏氏法

C.中国九分法

D.中国十分法

E.手掌法