（） is the control of temperature and humidity in a space tog

The dew point is reached when the ______.

A.temperature of the air equals the temperature of the seawater

B.atmospheric pressure is 14.7 lbs. per square inch

C.relative humidity reaches 50%

D.air becomes saturated with water vapor

As the temperature for a given mass of air increases, the ______.

A.dew point increases

B.dew point decreases

C.relative humidity increases

D.relative humidity decreases

A.cooling only

B.cooling and humidifying

C.cooling and dehumidifying

D.adiabatic(绝热的)cooling

As the temperature for an air mass decreases, the ______.

A.absolute humidity increases

B.relative humidity increases

C.specific humidity increases

D.dew point rises

Cloud formations are minimal when the ______.

A.surface temperature and temperature aloft are equal

B.surface temperature and temperature aloft differ greatly

C.barometric pressure is very low

D.relative humidity is very high

阅读下列说明和C++代码，将应填入 (n)处的字句写在答题纸的对应栏内. 【说明】 某实验室欲建立一个实验室环境监测系统，能够显示实验室的温度、湿度以及洁净度等环境数据。当获取到最新的环境测量数据时，显示的环境数据能够更新。 现在采用观察者(Observer)模式来开发该系统。观察者模式的类图如图5-1所示。

【C++代码】 include <iostream> include <vector> using namespace std; class Observer { public: virtual void update(float temp, float humidity, float cleanness)=0; }; class Subject { public: virtual void registerObserver(Observer* o) = 0; //注册对主题感兴趣的观察者 virtual void removeObserver(Observer* o) = 0; //删除观察者 virtual void notifyObservers() = 0;//当主题发生变化时通知观察者 }; class EnvironmentData : public （1） { private: vector<Observer*> observers; float temperature, humidity, cleanness; public: void registerObserver(Observer* o) { observers.push_back(o); } void removeObserver(Observer* o) { /* 代码省略 */ } void notifyObservers() { for(vector<Observer*>::const_iterator it = observers.begin(); it != observers.end(); it++) { （2） ; } } Void measurementsChanged() { （3） ; } void setMeasurements(float temperature, float humidity, float cleanness) { this->temperature = temperature; this->humidity = humidity; this->cleanness = cleanness; （4） ; } }; class CurrentConditionsDisplay : public （5） { private: float temperature, humidity, cleanness; Subject* envData; public: CurrentConditionsDisplay(Subject* envData) { this->envData = envData; （6） ; } void update(float temperature, float humidity, float cleanness) {this->temperature = temperature; this->humidity = humidity; this->cleanness = cleanness; display(); } void display() { /* 代码省略 */ } }; int main() { EnvironmentData* envData = new EnvironmentData(); CurrentConditionsDisplay* currentDisplay = new CurrentConditionsDisplay(envData); envData->setMeasurements(80, 65, 30.4f); return 0; }