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Trucks using the interstate highway delivers more than ______.
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更多“Trucks using the interstate hi…”相关的问题
听力原文： For more than two hundred years people have been using trains. There are trains to carry people, trains to carry animals. There are fast trains, slow trains, trains that go under the ground, trains that go through mountains. In busy cities, trains have been put under the ground. The subway trains run on tracks through huge tunnels under the noise and traffic of the city. The monorail is another kind of train used in busy places. The train hangs from a rail high above the streets and it carries people quickly in and out of the city. Railroad tunnels which are miles long have been built through mountains. Do you think these tunnels are ready to build？ They are not. Workers spend many years on the job. Is it possible for a train to travel over water？ Yes, it is. Great bridges have been built just for trains. And railroad tunnels have been built under the water. Some trains travel great distances. You can travel for 2,461 miles on Australia's trains which go across the continent or you can ride 6,000 miles across Russia. Today's trains have nice little bedrooms and dining rooms for people who travel long distances. Years ago trains were used to carry important people. These trains had beautiful bedrooms, bathrooms, dining roans, and sitting rooms. They were like Hale palaces really fit for a king. You have probably seen freight trains. There are many kinds. There are trains to carry logs, refrigerator trains to carry food, tank trains to carry fuel, even trains to carry cars. Some trains carry trucks and take them to other places. Then the trucks can travel on the roads. Trains have long been useful to men and women and to children. Many children have model trains. With the model trains they can build their own railroads and enjoy the wonderful world of trains.
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A．More than three hundred years.
B．More than one hundred years.
C．More than four hundred years.
D．More than two hundred years.
有如下程序： #include＜iostream＞ using namespace std； int main(){ int sum； for(int i=0；i＜6；i+=3){ sum=i； for(int j=i；j＜6；j++)sum+=j； } cout＜＜sum＜＜end1； return 0； } 运行时的输出结果是()。
A．3
B．10
C．12
D．15
有以下程序 include ＜lostream＞ using namespace std; int main() { int i=010,j=10; cout＜＜(i)＜＜","＜＜j--＜＜endl; return 0; } 则该程序运行后的输出结果是【 】。
阅读下面程序，写出输出结果。
#include using namespace std ; class A { int a, b; public : A() { a = b = 0; }
A(int aa, int bb) { a = aa; b = bb; cout ＜＜ a ＜＜ ' ' ＜＜ b ＜＜ endl ; } }; int main() { A x, y(2,3);
return 0; }
A．No using the computer.
B．Taking effective computing practices.
C．No connecting the internet.
D．Falling back on the specialist.
有以下程序： #include＜iostream＞ using namespace std; class R { public: R(int r1,int r2) { R1=r1; R2=r2; } void print(); void print0const; private: int R1,R2; }; void R::print() { cout＜＜R1＜＜","＜＜R2＜＜endl; } void R::print() const { cout＜＜Rl＜＜","＜＜R2＜＜endl; } int main() { R a(5,4); const R b(20,52); b.print(); return 0; } 执行后的输出结果是()。
A．5，4
B．20，52
C．0，0
D．4，5
The text implies that
A．professional people should pick out proper information from the Internet for schools.
B．professional people should instruct teachers and students to use the Internet.
C．educators should be active in using computer.
D．educators should have their own email address.
A.1,2
B.3,4
C.2,3
D.5,5
