【單選題】設 x,y 均為已定義的類名,下列聲明對象x1的語句中正確的是( )

【判斷題】構造函數的方法名可以由編程人員任意命名。

【單選題】能夠實現對原文的鑒別和不可否認性的認證技術是( )。

【單選題】設有定義語句int a[]={66,88,99}; 則以下對此語句的敘述錯誤的是( )。

【判斷題】Unicode碼與ASCII碼相同。

【多選題】已知如下定義:String s = “story”, 下面哪個表達式是合法的:

【單選題】定義主類的類頭時可以使用的訪問控制符是( )

【單選題】下列程序段執行后t1的結果是( )。int x1 = 9, x2 = 6, t1; t1 = x1 > x2 ? x1 : x2;

【填空題】定義類的保留字是(__)定義接口的保留字是(__);

【多選題】以下屬于正確的java注釋有

【單選題】方法的作用不包含:( )

【填空題】listening unit test 1-5 Unit 7 滿分: 10 分 Part I Directions: In this section, you’ll hear some passages. At the end of each passage, you'll hear some questions. Both the passage and the questions will be spoken only once. After each question, choose the best answer from the four choices marked A, B, C, and D. Questions 1 to 4 are based on the passages you have just heard. 1 ) A . Doing a business. B . Signing a contract. C . Making a travel. D . Starting a new trade. 2 ) A . Receiving a diamond ring. B . Getting a bunch of flowers. C . Obtaining a large amount of money. D . Receiving a new house. 3 ) A . Have the ceremony in a church. B . Get married in a scenic spot. C . Have the ceremony while riding on horseback. D . Have the ceremony in a hotel. 4 ) A . The style of colors, decorations and music. B . The bride wears a long white wedding dress. C . The wedding places and the clothes for the guests. D . The way of inviting friends to the ceremony. Questions 5 to 7 are based on the passages you have just heard. 5 ) A . All those who get on well with each other are friends. B . Friends are closer than people who just get on well with each other. C . Everyone understands clearly how to make friends. D . Factors like age and background aren’t important in friendship. 6 ) A . Even friends may have differences of opinions. B . Supporting and understanding in friendship results from shared background. C . It generally takes time for people to become close friends. D . Someone’s habits may annoy his or her friends. 7 ) A . They must hold a ceremony to create a powerful bond. B . They have to eliminate differences in background. C . They should make friends with those who are of same age and race. D . They should support and understand each other. Part II Directions: In this section, you will hear some news reports. At the end of each news report, you will hear some questions. Both the news and the question will be spoken only once. After each question, Choose the best answer from the four choices marked A, B, C, and D. Questions 8 to 10 are based on the passages you have just heard. 8 ) A . Intelligent and educated. B . Sociability and good cook. C . Dependable character. D . Mutual attraction and love. 9 ) A . 17th place. B . 20th place. C . Last place. D . 12th place. 10 ) A . Someone who is well educated and a good cook. B . Someone who is good at housekeeping and cooking. C . Someone who can share the financial burden. D . Someone who has a good appearance.

【填空題】Java程序結構分為(__),(__)和(__)三種;

【單選題】既能發電 , 又能儲存能量的是 ( ) 。

【單選題】結合了不同類型的防火墻特點的是( )。

【填空題】面向對象程序的主要特征:繼承,(__),(__);

【多選題】下面句話是正確的(AD)

【單選題】以下()是規范交易主體的有關法律。

【判斷題】一個Java類可以有一個直接父類,并可以實現多個接口。

【判斷題】Java語言是編譯解釋型語言

【多選題】如下哪些是Java中有效的關鍵字()

【填空題】Java語言中提供的GUI功能主要由java.awt包和(__)包中的類和接口實現;

【填空題】Java將運行錯誤分為兩類:(__)和(__), 其對應的類均派生自(__)類;

【判斷題】Java支持多重繼承。

【單選題】為了區分重載多態中同名的不同方法,要求( )

【填空題】在Java語言中,邏輯常量只有true和(__)兩個值;

【多選題】世界各國立法的基本原則有()。

【判斷題】在 330kV 及以下發電廠和變電所中一般選用三相式變壓器。 ( )

【判斷題】水平方向布置的三相平行導體在發生三相短路時 , 最大電動力出現在 A 相。 ( )

【單選題】如何強制垃圾回收一個對象?

【單選題】廠用高壓變壓器系統接地電流小于10A,高壓變壓器的中性點運行方式應采用()

【填空題】一個完整的URL地址由(__),(__)端口和文件四部分組成;

【判斷題】Java的源代碼中定義幾個類,編譯結果就生成幾個以“.class”后綴的字節碼。

【單選題】以下( )是正確的域名體系結構。

【單選題】互聯網的基本特征不包括( )

【單選題】為了使包sos在當前程序中可見,可以使用的語句是( )

【判斷題】不論是否捕捉到異常try{}catch ){} finaly{}語句中finally塊中的代碼總要被執行。

【單選題】1000MW發電機組廠用電高壓系統額定電壓采用()

【單選題】公開密鑰密碼體制中,加密模式下加密密鑰即( )。

【判斷題】Java中,一個類可以有多個直接父類

【單選題】具有防暴反劫功能的是()

【單選題】以下屬于垂直生鮮電商平臺的是()。

【填空題】一個類實現某個接口時必須實現接口中聲明的所有方法,否則該類必須定義為(__);

【單選題】以下屬于大電商平臺生鮮頻道的是().

【單選題】若有定義int a = 2;則執行完語句a += a -= a * a; 后,a的值是( )

【填空題】Java采用(__)編碼的字符集,其字符類型占用 (__)字節內存空間。

【單選題】符合對象和類關系的是:

【單選題】在 10KV 出線上 , 電流互感器通常 ( ) 。

【單選題】鍋爐給水泵屬于( )負荷?

【單選題】以下選項中,合法的賦值語句是( )