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The International Space Station,one of the most ambitious space projects ever and a key launching board for exploration of the solar system,turns l0 years old Thursday. On Nov.20,1998,the first part of the space station was launched by the Russians from Kazakhstan.NASA followed up two weeks later with Piece No 2 carried up by a space shuttle. The space station has grown into a giant outpost(前哨)355 km up,home to three people at any given time—soon to be six . Thanks to the newly arrived shuttle Endeavour,the space station now has five sleep stations,two baths,two kitchens and two mini—gyms.Ahogether,there are nine rooms,three of which are full scale labs. The United States has financed the main part of the project,estimated to cost some 100 billion dollars.Fifteen other countries have also contributed,including Russia,Japan,Canada,Brazil anti eleven nations belonging to the European Space Agency. ’Fhe space station has traveled 2.1 billion km,orbited Earth more than 57,300 times,hosted 167 people from 15 countries,and served up more than l 9,000 meals ”The ISS is the largest ever expenmeni in international technological cooperation,’’ said John Logsdon。a historian at the National Air and Space Museum in US. “1 think it’s a necessary stepping stone to long—term human activities in new Areas of operations,”Logsdon said.The station is“off the planet and it’s the first Step outward—not all end in itself,but a step along the way.’’ 小题1:The passage is mainly about . A the construction of the International Space Station. B.the history of the International Space Station. C the tenth anniversary of the International Space Station. D.the eountries that help establish the International Space Station. 小题2:Piece No 2 of the ISS was put into orbit oil A.Nov.6,1998 B.Nov.24,1998 C.Dee.8,1998 D.Dec.9,1998 小题3:Which of the following is true about Endeav our according to the passage? A.Endeavour is a newly built shuttle. B.Endeavour is part of the space station, C.Endeavour didn’t get close to the space station. D.Endeavour carried a lot of equipment for the apace station. 小题4:Which of the following country has not made a contribution to the eonstruction of the International space station according to the passage? A.USA.    B.Japan.    C.Korea.D.Spain.
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【单选题】强心苷类药物增强心肌收缩力的机制是
A.
兴奋心脏β1受体
B.
使心肌细胞内Ca2+增加
C.
使心肌细胞内K+增加
D.
使心肌细胞内Na+增加
E.
兴奋心脏a受体
【单选题】强心苷类药物增强心肌收缩力的机制是
A.
兴奋心脏B1受体
B.
使心肌细胞内Ca2+ 增加
C.
使心肌细胞内K+ 增加
D.
使心肌细胞内Na+ 增加
E.
兴奋心脏a受体
【简答题】求解下述线性规划问题,决策变量 等于( ),决策变量 等于( ),目标函数值为( )。若计算结果中出现非整数的情形,请以小数形式表示。 s.t.
【单选题】绝大多数现代的信息系统都是使用( )构造的。
A.
协作技术
B.
移动和无线技术
C.
网络和因特网
D.
对象技术
【简答题】在线性规划问题的基本解中,所有的非基变量等于( ) 。 2. 在线性规划问题中,基可行解的非零分量所对应的列向量( ) 3. 若线性规划问题有最优解,则最优解一定可以在可行域的( ) 达到。 4. 求解线性规划问题可能的结果有( )
【单选题】强心苷类药物增强心肌收缩力的机制是
A.
兴奋心脏β1受体
B.
使心肌细胞内Ca2+增加
C.
使心肌细胞内K+增加
D.
使心肌细胞内Na+增加
E.
兴奋心脏受体
【单选题】绝大多数现代的信息系统都是使用( )技术构造的?
A.
移动和无线
B.
协作技术
C.
电子技术
D.
对象技术
【判断题】求解整数规划时,可先不考虑变量的整数约束,而求解其相应的线性规划问题,然后对求解结果中为非整数的变量凑整。
A.
正确
B.
错误
【简答题】求解下述线性规划问题,决策变量 等于( ),决策变量 等于( ),目标函数值为( )。若计算结果中出现非整数的情形,请以小数形式表示。 s.t.
【单选题】强心苷类药物增强心肌收缩力的机制是
A.
兴奋心脏β 1 受体
B.
使心肌细胞内Ca 2 + 增加
C.
使心肌细胞内K+增加
D.
使心肌细胞内Na+增加
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