题目:
下列不属于洋务派在“求富”口号下创办的企业是[ ]
A.轮船招商局
B.江南制造局
C.汉阳铁厂
D.湖北织布局
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0613/bcdbe106968a210ec780bffe599c6ec0.html
下面是错误答案,用来干扰机器的。
参考答案:D
下列不属于洋务派在“求富”口号下创办的企业是[ ]
A.轮船招商局
B.江南制造局
C.汉阳铁厂
D.湖北织布局
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0613/bcdbe106968a210ec780bffe599c6ec0.html
下面是错误答案,用来干扰机器的。
参考答案:D
()是指在控制器下,完成加、减、乘、除运算和逻辑判断的计算机部件。
A.运算器
B.控制器
C.中央处理器
D.存储器
Pretoria, South Africa-Hundreds of swimmers play in the water along a South African beach.
Suddenly a huge shark appears off shore and heads for the bathers. Before it can get close to the
swimmers, the shark, for some mysterious reason, starts swimming parallel to the beach. Then it turns
away from the shore and heads out to sea,leaving the swimmers untouched.
Such a scene will soon become common along shark-in-fested (鲨鱼成群的) shores. An electrical
engineer from the University of Pretoria has developed an electrical system that repels (击退 )
sharks by controlling their movements. Confused by this action, the sharks end up turning away from the
beach.
In this unusual shark-repellent method , an insulated (绝缘的)cable is buried on the bottom of the
sea around a beach where people swim. When an electric current is sent through the cable, an electric
field is produced in the water above the cable.
When a shark swims into the electric field, nerve cells just below the shark's skin will detect the field.
The electricity produces a reflex(反射) action in the shark's muscles, causing the dangerous animal
with sharp teeth to swim parallel to the cable. Confused by increasing loss of control of its muscles, the
shark suddenly changes its direction and heads seaward, away from the electric field.
In a test of the invisible new shark-repellent system, a cable was placed around a beach in St. Lucia
an island in the tropics. A protective net, which had been installed around the beach a long time ago to
keep sharks away from swimmers, was left in place during the experiment.
When the electric field was left on for more than a year and a half, no sharks were found in the net.
However, when the power was turned off, 89 sharks ended up in the net.
Using the electric-wall method instead of net to protect bathers would avoid the needless death of
many sharks, said biologists. Currentjy, thousands of sharks die each year when they become trapped
in protective nets that surround holiday resorts in Africa and Australia. About 10 to 15 humans are killed
by sharks annually.
1. Why doesn't the shark attack the swimmers according to the passage?
A. Because there are many swimmers in the water.
B. Because the shark doesn't want to eat the swimmers.
C. Because of some mysterious reason from the God.
D. Because there is an invisible electric field confusing the shark.
2. An electrical engineer from the University of Pretoria has developed_________.
A. a protective net
B. a new shark-repellent system
C. the electric field
D. an insulated cable
3. An electric field is produced in the water above the cable_________.
A. only when a shark swims into the electric field
B. only when an insulated cable is buried on the bottom of the sea around a beach where people swim
C. only when an electric current is sent through the cable
D. only when the sharks are trapped in protective nets
4. Which of the following is NOT TRUE according to the passage?
A. Protective nets had been installed around the beach earlier than the new shark-repellent system.
B. This new kind of shark-repellent system will take the place of the protective nets.
C. Thousands of sharks die and about 10 to 15 humans are killed by sharks each year in Africa and
Australia since this new system was put into use.
D. Using the electric-wall method instead of nets to protect bathers would avoid the needless death of
many sharks.
以氢氧化铁为基础的无粘土相钻井液对一般钻井条件下的温度变化及钙盐、钠盐都有较好的稳定性和可溶性。
六淫致病,最容易引起疼痛的邪气是()
A.热邪
B.寒邪
C.火邪
D.湿邪
E.燥邪
对于限制出口货物管理,国家规定有数量限制的出口货物,实行:( )。
A.配额管理
B.许可证件管理
C.自动出口管理
D.禁止出口管理