在①分子、②原子、③质子、④中子、⑤电子、⑥离子这些微粒中（填序号）： （1）能

视 * * 水肿最常见于下列哪种疾病（）

A.原发性青光眼

B.糖尿病

C.球后视神经炎

D.脑肿瘤

E.早期动脉硬化症

C

Last Sep.11 was an important day too. After unknown gunmen attacked aid workers from the Nobel Prize-winning Medecins sans Frontieres at a roadblock on that day , most of the international aid groups helping Darfur’s 6 million people stopped using the roads . On Dec.18 , unknown gunmen attacked the southern town of Gereida. More than 70 aid workers then pulled out of the refugee(难民) camp there—Darfur’s largest, with 130,000 people —leaving only 10 Red Cross employees behind. Yet at the time no one said what had really caused the sudden pullbacks.

Damaging has become surprisingly common in Darfur, where 200,000 Africans have been killed and a third of the population have been sent fleeing into camps in three years of war. But the attacks on international aid workers suggested a dramatic and dangerous start—to attack on purpose those helping to keep Darfur’s millions of refugee alive. A dozen people from foreign NGOs (non－governmental organizations) have been killed in just the past six months , more than previous years. There are about 14,000 aid workers in Darfur now , the majority of them Sudanese, working for foreign NGOs and U.N. agencies and delivering $1 billion a year in aid . Just a few more terrible attacks could throw that into jeopardy. Last week 14 U.N. offices working in Darfur made a clear warning that “the humanitarian (人道主义) organization cannot possibly make certain the survival of the population Darfur if aid workers don’t feel safe. ”

64．What made Sept．11 an important day according to the passage?

A．Two World Trade Center buildings were destroyed in the USA．

B．International aid workers were attacked in Darfur．

C．A fight happened between the international aid workers and some unknown gunmen in Darfur．

D．International aid groups stopped their help to Darfur．

65．Which of the following shows a picture of Darfur?

A．Darfur has been in war since the last Sept．11．

B．Many people in Datfur are homeless because of the war．

C．Darfur will not get help from organizations including the UN．

D．International aid groups have never been attacked before．

66．The underlined word“jeopardy”in the last paragraph most probably means     ．

A．light                   B．practice              C．danger            D．effect   

67．Which of the following can be the tide of the passage?

A．People in        Darfur        B．International Aid Groups in Danger

C．War in Darfur                D．International Aid to Darfur

下列关于肝脓肿的MR表现，错误的是（）。

A.T1WI呈低信号

B.T2WI呈高信号

C.脓肿腔内发现气体影不是肝脓肿的表现

D.增强扫描脓肿壁可以呈环状强化

E.脓肿壁的信号稍高于脓腔，但低于正常肝组织

某方案年设计生产能力为6000件，每件产品价格为50元，单件产品变动成本为20元，单件产品销售税金及附加(含增值税)为10元。年固定总成本为64000元。用产量表示的盈亏平衡点为( )件。

A．800

B．1600

C．2133

D．3200

下列选项中属于AK-47缺点的是（）。

A.性能优良

B.勤务性好

C.坚实耐用

D.连续射击时，精准度差