贯穿《朝花夕拾》全书的人物形象是（ ）A．范爱农 B．藤野先生 C．作者“我” D

角膜缘干细胞缺乏患者的临床表现可能为（）

A.角膜表面的结膜化

B.角膜基底膜的破坏和细胞侵入

C.持续性角膜溃疡

D.角膜慢性炎症

E.角膜不同程度的血管化

Five million people visit Grand Canyon in the US every year. For the purpose of helping project Grand Canyon for your fellow visitors and future generations, please follow the guidelines below.

Camping

To project the park, camping is allowed only within permitted campgrounds. Permits are required for overnight camping at the North Rim. Advance booking can be received by mail. Please write: Information Center, P.O. Box 129, Grand Canyon, AZ 86023

Fires

Because of the extreme fire danger, campfires are not allowed except at Mather and Desert View campgrounds. Collection of firewood is not allowed either.

Hiking(远足)

Please stay on permitted paths. Otherwise you may destroy desert plants. Pack out what you pack in, so you leave no signs of your visit. It is important to keep in mind that you are in a national park where wildlife exists.

Weather

The weather at Gramd Canyon can change very quickly. With so much rock, lightning(闪电) causes a particular danger during sudden summer storms. These storms also frequently bring floods inside valleys, a danger to hikers. Watch the skies and check daily weather reports.

Wildlife

Do not feed park wildlife. There have been a few cases at Gramd Canyon National Park where deer(鹿) were purposely shot because they are plastic bags that left them sick and weak. Hungry deer can be danger and have kicked and bitten visitors at Grand Canyon. Some other animals will also beg and bite. For your own safety and the well-being of the animals, please do not feed wildlife, no matter how gentle they may appear.

小题1:What can you do first if you want to go camping?

A．Know the permitted

B．Book campgrounds in advance

C．Make sure not to make a fire

D．Stop at Mather and Desert View小题2:What do the underlined words “pack out what you pack in” in Paragraph 4 probably mean?

A．keep every out of campgrounds

B．take away everything you bring in

C．carry all the necessary food

D．look after your personal belongings小题3:Why were some deer killed on purpose at Grand Canyon?

A．They ate wrong things and became very ill.

B．They were a danger to other gentle animals.

C．They begged food from visitors.

D．They kicked and bit visitors.小题4:What is the main purpose of the text?

A．To provide travel information

B．To report some recent news.

C．To teach tourists hiking skills

D．To introduce the wild life

卵巢癌最佳治疗措施是

A．化疗
B．放疗
C．手术切除
D．手术＋化疗
E．化疗＋放疗

结晶器振动是为防止初生坯壳与结晶之间的粘结而被拉漏。

中华人民共和国境内的信息系统安全专用产品生产者在其产品进入市场销售之前，必须申请（）

A.《卫生许可证》

B.《计算机信息系统安全专用产品销售许可证》

C.《生产许可证》

D.《计算机销售许可证》