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【单选题】
国产“和谐号”新一代高速动车组在高铁枣庄至蚌埠综合试验时跑出了时速486.1公里,再次刷新世界铁路运营试验最高速。蕴含的哲理是()
A.
实践是在一定的社会关系中进行的
B.
实践是认识的最终目的
C.
认识是在变革对象的实践中发展的
D.
人类的实践活动受到一定历史条件的制约
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【判断题】相贯线是相互贯穿的两个基本体表面的共有线,它一定是封闭的空间曲线。
A.
正确
B.
错误
【单选题】She devoted herself _____ the problems of the teenagers? [     ]
A.
in studying
B.
at studying
C.
to study
D.
to studying
【单选题】She is studying at a music college,  and _____ she is also studying economics. She wants to be a manager. [     ]
A.
at that time
B.
at that moment
C.
 at the same time
D.
 at the same times
【单选题】314"德宇"系列家用电器以其质量好、价格适中受到城乡居民的欢迎,该厂负责人决定聘请专家制定企业未来3~5年的发展计划,你认为下述论述中最合理的是( ).
A.
规定组织各项活动的行动方案
B.
详细制定企业各部门索要表达的具体指标
C.
确定组织应该从事的各种活动的详细指标
D.
制定企业发展蓝图,规定组织各部门从事活动应该达到的目标
【单选题】He is studying _____ while my brother is studying _____ at school. [     ]
A.
the law; the computer
B.
a law; a computer
C.
laws; computers
D.
law; computer
【简答题】A.They are studying why people expend calories. B.They are studying how long people should spend on exercising. C.They are studying what is the most important way of keeping fit. D.They are studying w...
【单选题】从键盘输入一个英文字母,如果它是大写英文字母,则将其转换为小写英文字母,如果它是小写英文字母,则将其转换为大写英文字母,然后将转换后的英文字母及其ASCII码值显示到屏幕上,如果不是英文字母,则不转换直接将它及其ASCII码值输出到屏幕上。按要求在空白处填写适当的表达式或语句,使程序完整并符合题目要求。 1. #include 2. int main() 3. { 4. char ch;...
A.
第8行: ch >= A && ch <= Z 第12行: ch>= a && ch <= z
B.
第8行: ch >= 'A' && ch <= 'Z' 第12行: ch>= 'a' && ch <= 'z'
C.
第8行: ch ≥ 'A' && ch ≤ 'Z' 第12行: ch ≥'a' && ch ≤ 'z'
D.
第8行: ch ≥ A && ch ≤ Z 第12行: ch ≥ a && ch ≤ z
【单选题】下面自定义函数能够正常运行的是()
A.
int f( ) { cout << "function" << endl }
B.
f( ) { cout << "function" << endl; }
C.
int f { cout << "function" << endl; }
D.
int f( ) { cout << "function" << endl; }
【单选题】Now she is _____ the test. [     ]
A.
study for
B.
study with
C.
studying for
D.
studying with
【单选题】Do all the students know _____ ? [     ]
A.
why they are studying for
B.
what are they studying
C.
what they are studying for
D.
what are they studying for
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