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【单选题】
More and more people around the world are taking part in dangerous sports and activities. Of course, there have always been people who have looked for adventure(冒险)—those who have climbed the highest mountains, searched into unknown parts of the world or sailed in small boats across the greatest oceans. I would consider bungee(蹦极) jumping to be a good example of such an activity. You jump from a high place 200 meters above the ground with a rope tired to your feet. You fall at up to 150 kilometers an hour until the rope stops you from hitting the ground. Why do people take part in such activities as these? Some people suggest that it is because life in modem societies has become safe and uninteresting. But in the past, they had to go out and hunt for food, and diseases could not easily be cured. Nowadays, life offers little excitement(刺激). They live and work in safe conditions, they buy food in shops, and there are doctors and hospitals to look after them if they become iii. The answer for some people is to look for danger in activities such as bungee jumping. According to the passage, more and more people around the world today ______.
A.
are taking part in games that are very safe
B.
are aware of the risks of some activities
C.
arc trying dangerous activities for excitement
D.
are looking for ways of showing their courage
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举一反三
【单选题】( )不属于企业的财务活动。
A.
企业筹资引起的财务活动
B.
企业管理引起的财务活动
C.
企业经营引起的财务活动
D.
企业投资引起的财务活动
【简答题】企业的财务活动包括()。 (A) 企业筹资引起的财务活动 (B) 企业投资引起的财务活动 (C) 企业经营引起的财务活动 (D) 企业分配引起的财务活动 (E) 企业管理引起的财务活动
【多选题】根据对偶问题的性质,请从以下选项中,选出所述内容是正确的
A.
当原问题为无界解时,其对偶问题无可行解
B.
当原问题为无界解时,其对偶问题 无界解
C.
当对偶问题无可行解时,其原问题具有无界解
D.
当对偶问题无可行解时,其原问题或具有无界解或无可行解
【单选题】根据对偶问题的性质,请从以下选项中,选出所述内容是正确的
A.
当原问题为无界解时,其对偶问题无可行解
B.
当对偶问题无可行解时,其原问题具有无界解
C.
若线性规划的原问题有无穷多最优解,则其对偶问题也一定具有无穷多最优解
D.
若线性规划的原问题有无穷多最优解,则其对偶问题不一定具有无穷多最优解
【单选题】平面汇交力系平衡的必要与充分条件是力系的( )。
A.
∑Fx=0
B.
合力为零
C.
∑Fy=0
D.
合力不为零
【单选题】平面汇交力系平衡的必要与充分条件是力系的合力?
A.
等于零
B.
等于常数
C.
不一定等于零
【单选题】( )不属于雇主责任风险的范围。
A.
雇员在工作场所被所用机器砸伤
B.
雇员公出旅行发生车祸
C.
雇员在公共场所突发疾病
D.
雇员个人汽车被盗
【判断题】企业资金是企业开展所有经济活动的前提与保证,因此企业的筹资活动是企业组织财务活动的关键。(    )
A.
正确
B.
错误
【单选题】根据对偶问题的性质,请从以下选项中,选出所述内容是正确的
A.
若线性规划的原问题有无穷多最优解,则其对偶问题一定存在唯一最优解
B.
当原问题为无界解时,其对偶问题无可行解
C.
当对偶问题无可行解且原问题存在可行解时,则原问题具有无界解
D.
以上皆否
【多选题】企业的财务活动包括( )。
A.
企业资金筹集引起的财务活动
B.
企业资金投放引起的财务活动
C.
企业资金耗费引起的财务活动
D.
企业资金收入引起的财务活动
E.
企业资金分配引起的财务活动
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