FZy-CTC系统发送列车接车进路预告信息，在（）收到即停发，发送信息为车次号＋机车

关于世界海陆分布的叙述，正确的是[ ]

A．陆地主要集中在南半球

B．北半球的陆地面积小于海洋面积

C．南极地区以海洋为主

D．北极地区以陆地为主

原子物理中常用一个特殊的质量单位，即“原子质量单位”，符号为u，1u =1. 6606 ×10^-27kg( 电子电量为e=1.6 ×10^-19C) ，相当于931.5 MeV的能量，秦山核电站第一期工程装机容量为30万千瓦，如果1g铀235完全裂变时产生的能量为8.2 ×10¹⁰J ，请问1g铀235完全裂变的质量亏损是____ （保留两位有效数字）．假定所产生的能量都变成了电能，那么每年（一年按365 天计算） 消耗铀235___kg.

“卢沟桥，卢沟桥，男儿坟墓在此桥！最后关头已来到，牺牲到底不屈挠——卢沟桥，卢沟桥，国家存亡在此桥！”70年前，卢沟桥成为全世界的焦点。这主要是因为在这里发生了 [ ]

A．四一二 * *

B．七七事变

C．西安事变

D．九一八事变

阅读理解。

     Five million people visit Grand Canyon in the US every year. For the purpose of helping protect Grand

Canyon for your fellow visitors and future generations, please follow the guidelines below.

Camping

     To protect 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

     Please stay oil 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 Grand Canyon can change very quickly. With so much rock,lightning 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 Grand Canyon National Park where deer were

purposely shot because there are plastic bags that left them sick and weak. Hungry deer car be dangerous 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.

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 afire.

D. Stop at Mather and Desert View.

2. 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 afire.

D. Stop at Mather and Desert View.

3. Why were deer killed on purpose at Grand Canyon?

A. They ate wrong things and become very ill.

B. They were a danger to other gentle animals.

C. They begged food from visitm-3.

D. They kicked and bit visitors.

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 wildlife.

女性，30岁，出现蛋白尿3个月，24小时尿蛋白总量为35g，有肘、肩、双手指关节疼痛病史已2年，为明确诊断，最需要做的检查是（）

A.抗核抗体谱检查

B.肾功能检查

C.抗"O"检查

D.类风湿因子

E.C反应蛋白