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【简答题】
阅读短文,根据其内容,选择最佳选项完成下列各题。(10分) Paragraph 1:     Scientists have learned a lot about the kinds of food people need. They say that there are several kinds of food that people should eat every day. They are: (1) green and yellow vegetables of all kinds; (2) citrus(柑桔) fruits and tomatoes; (3) potatoes and other fruits and vegetables; (4) meat of all kinds, fish and eggs; (5) milk and foods made from milk; (6) bread or cereal(谷物), rice is also in this kind of food; (7) butter, or something like butter. Paragraph 2:    People in different places of the world eat different kinds of things. Foods are cooked and eaten in many different kinds of ways. People in different countries eat at different times of the day. In some places people eat once or twice a day; in other countries people eat three or four times. Scientists say that none of the differences is really important. It doesn’t matter whether foods are eaten raw or cooked. It doesn’t matter if a person eats dinner at 4 o’clock in the afternoon or at 11 o’clock at night. The important thing is what you eat every day. Paragraph 3:   There are two problems, then, in feeding the large number of people on earth. The first is to find some ways to feed the world’s population so that no one is hungry. The second is to make sure that people everywhere have the right kinds of food to make them grow to be strong and healthy. 小题1:From the first paragraph we know noodles belong to a kind of ______ food. A.vegetable B.fruit C.meat D.cereal 小题2:According to the scientists, which of the following groups is the healthiest for your lunch? A.chicken, apples, cereal, cabbages B.potatoes, rice, bread, carrots C.oranges, bananas, fish, tomatoes D.beef, pork, fish, milk 小题3:People in different places of the world ______. A.have the right kinds of food to eat B.cook their food in the same way C.have their meals at the same time D.eat food in different ways 小题4:Which of the following is NOT true? A.People in some places don’t have enough to eat. B.There are too many people in the world. C.One of the problems is that no one is hungry. D.The scientists are trying to make people grow to be strong and healthy. 小题5: If there is Paragraph 4, what do you think is going to be talked about? A.When people eat their meals. B.What to do with the two problems. C.How to cook food in different ways. D.Why people in different places eat different kinds of food.
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【多选题】建筑钢材的力学性能包括( )。
A.
拉伸性能
B.
冲击韧性
C.
耐疲劳性
D.
冷弯性能
E.
可焊性
【多选题】建筑钢材的力学性能包括( )
A.
拉伸性能
B.
耐疲劳性
C.
冲击韧性
D.
可焊接性
E.
抗冻性
【多选题】自主制导技术包括惯性制导、图像匹配制导、多普勒制导、程序制导、卫星制导等,它的 特点 是( )
A.
隐蔽性好,抗干扰能力强。
B.
导弹一经发射,飞行弹道就不能再改变的弊端。
C.
飞行时间越长或距离越久,制导精度会下降。
D.
可以攻击活动性好的目标
E.
适用于攻击固定目标
【单选题】对于各碰撞器的工作原理,下列说法错误的是()
A.
对于滚球式碰撞传感器,当汽车遇到碰撞使滚球的惯性力大于永久磁铁的吸力时,惯性力与磁力的合力就会使滚球沿导缸向触点方向移动,将两触点接通,从而接通搭铁回路。
B.
对于滚轴式碰撞传感器,当汽车遇到碰撞时,滚轴以很大速度到达止动销后反弹,向前滚动将滚动触点与固定触点接通,从而接通搭铁回路。
C.
对于偏心锤式碰撞传感器,当碰撞强度达到设定值时,转子总成偏转角度使转动触点与固定触点接触,进而接通搭铁回路。
D.
对于水银开关式碰撞传感器,当车辆发生碰撞且所产生减速度大于预先设定界限时,管中水银在惯性力作用下会使系统电路中断开触点闭合,利用水银导电特性,使电路导通,发出点火信号。
【多选题】建筑钢材的力学性能包括()。
A.
拉伸性能
B.
强度性能
C.
冲击性能
D.
疲劳性能
E.
抗压性能
【单选题】惯性制导导弹的特点是( )
A.
制导精度较高,制导精度小于10米
B.
能独立进行工作、不受气象条件的影响、抗干扰能力、隐蔽性好
C.
工作时不依赖外界信息,也不向外辐射能量,不易受到干扰,是一种被动式的制导方式
D.
不受人工或电磁场的干扰,自主性强,稳定性好,定位精度高
【简答题】增加一国外汇储备最稳定、最可靠、最主要的来源是______。
【单选题】惯性制导导弹的特点是( )
A.
制导精度较高,制导精度小于10米
B.
能独立进行工作、不受气象条件的影响、抗干扰能力、隐蔽性好
C.
可以全天候、全季节工作,制导精度约30米
D.
不受人工或电磁场的干扰,自主性强,稳定性好,定位精度高
【单选题】一国增加其外汇储备,最可靠、最稳定的来源是
A.
经常项目顺差
B.
资本项目顺差
C.
金融项目顺差
D.
综合顺差
【多选题】建筑钢材的力学性能包括( )。
A.
拉伸性能
B.
强度性能
C.
冲击性能
D.
疲劳性能
E.
抗压性能
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