多项选择题

按照文体特点的不同，调查报告大致可以划分为（）。

A.描述式调查报告
B.论说式调查报告
C.合一式调查报告
D.情况调查报告


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下列哪部影片是描写农村中复杂而尖锐的阶级斗争的
A、《摘苹果的时候》
B、《沙漠的春天》
C、《青春似火》
D、《鲜花盛开的村庄》

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Passage 4
Some pessimistic experts feel that the automobile is bound to fall into disuse. They see a day in the not-too-distant future when all autos will be abandoned and allowed to rust. Other authorities, however, think the auto is here to stay. They hold that the car will remain a leading means of urban travel in the foreseeable future.
The motorcar will undoubtedly change significantly over the next 30 years. It should become smaller, safer, and more economical, and should not be powered by the gasoline engine. The car of the future should be far more pollution-free than present types.
Regardless of its power source, the auto in the future will still be the main problem in urban traffic congestion (拥挤). One proposed solution to this problem is the automated highway system.
When the auto enters the highway system, a retractable (可伸缩的) arm will drop from the auto and make contact with a rail, which is similar to those powering subway trains electrically. Once attached to the rail, the car will become electrically powered from the system, and control of the vehicle will pass to a central computer. The computer will then monitor all of the car’s movements.
The driver will use a telephone to dial instructions about his destination into the system. The computer will calculate the best route, and reserve space for the car all the way to the correct exit from the highway. The driver will then be free to relax and wait for the buzzer (蜂鸣器) that will warn him of his coming exit. It is estimated that an automated highway will be able to handle 10,000 vehicles per hour, compared with the 1,500 to 2,000 vehicles that can be carried by a present-day highway.
28. What provides autos with electric power in an automated highway system?
A、A rail.
B、An engine.
C、A retractable arm.
D、A computer controller.

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矮牵牛喜冷凉气候，特别耐寒

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According to what you have learned in this lesson, which of the following statement is false?

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影响社会测量信度和效度的主要因素有哪些？

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关于Rf值，下列说法错误的是：（ ）

A．某一组分在固定相移动的距离与流动相本身移动的距离的比值
B．Rf 值与温度有关
C．Rf 值与展开剂有关
D．同一物质的Rf值是一常数

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用化学方法鉴别6，7-二羟基香豆素和7-羟基-8-甲氧基香豆素。

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泛水系屋面防水层与垂直墙交接处的防水处理，其常见高度为（  ）。 A.
120 B.
180 C.
200 D.
250

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战略管理的层次的最高层次是

A．公司层战略
B．职能层战略
C．业务层战略
D．整体层战略

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观察实践中产生观察误差的因素有哪些？

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