灰铸铁是指有（）的石墨的铸铁。

路风监察人员履行职责时，凭《监察证》可（）登乘各次列车（国际列车、进港直通车按有关规定办理），不受车种、席别限制。

A.签证

B.免费

C.在任何车站

D.免于签证

今年上半年，即从1月到6月间，全国大约有300万台录像机售出。这个数字仅是去年全部录像机销售量的35%。 通过这些数据我们可以知道( )。

A．今年录像机市场开始出现萎缩

B．今年的录像机销售量将少于去年

C．今年完全有可能突破去年的销售量

D．今年上半年销售量比去年同期有所下降

(三)

The Erie Canal was the first important national waterway built in the US. It crossed New York from Buffalo on Lake Erie Troy to Albany on the Hudson River. It joined the Great Lakes with the Atlantic Ocean. The canal served as a route over which industrial goods could flow into the west, and materials could pour into the east. The Erie Canal helped New York develop into the nation’s largest city.

The building of the canal was paid for entirely by the state of New York. It cost $ 7 143 789, but it soon gained its price many times over. Between 1825, when the canal was opened, and 1882, when toll charges were stopped, the state collected $121 461 891.

For a hundred years before the Erie was built, people had been talking about a canal which could join the Great Lakes and the Atlantic Ocean. The man who planned the Erie Canal and carried the plan through was De Witt Clinton. Those who were against the canal laughingly called it "Clinton’s Ditch". Clinton talked and wrote about the canal and drew up plans for it. He and Governor Morris went to Washington in 1812 to ask for help for the canal, but they were unsuccessful.

Clinton became governor of New York in 1817, and shortly afterwards, on July 4, 1817, broke ground for the canal in Rome, N. Y. The first part of the canal was completed in 1820. As the canal grew, towns along its course developed fast. The length of the canal is 363 miles.

We can see that the Erie Canal（）.

A．joined the Great Lakes together

B．crossed New York from north to south

C．played an important part in developing New York City

D．was the first waterway built in the US

下列关于商品流通网络结构的类型，说法错误的是( )。

A．多中心平行型结构：在一个地区性的商品流通网络中，以多个城市为中心
B．同心圆外推型结构：以一个较大的城为中心，无规律地向四周辐射和对流
C．远程集散型结构：大中城市作为商品流通网络中心，城市起商品集散地作用
D．远程对流型结构：一些大中城市作为商品流通网络中心，除了同毗邻地区或城市结成网络以外，还能同较远的城市地区对流，发生非常密切的经常的和相对稳定的交流关系或经济体系

肝硬化患者的营养治疗措施有（）。

A.脂肪摄入要适量，可不必过分限制，但不能高

B.肝硬化患者肝功能减退，胆汁合成减少，脂肪消化受到影响，只能少量食用植物油

C.严格控制脂肪的摄入量

D.肝硬化患者要限制中链甘油三酯（MCT）的摄入

E.肝硬化患者脂肪的营养治疗措施没有特殊要求