要声明具有两个泛型的、名为A的类,请使用_______________。 A: publicclassA<E>{...} B: publicclassA<E,F>{...} C: publicclassA(E){...} D: publicclassA(E,F){...}
要声明具有两个泛型的、名为A的类,请使用_______________。 A: publicclassA<E>{...} B: publicclassA<E,F>{...} C: publicclassA(E){...} D: publicclassA(E,F){...}
以下类或者接口定义中正确的是()。 A: publicclassA{privateintx;publicintgetX(){returnx;}} B: publicabstractclassA{privateintx;publicabstractintgetX(){returnx;}publicabstractintaMethod();} C: publicclassa{privateintx;publicabstractintgetX();} D: publicinterfaceinterfaceA{privateintx;publicintgetX(){returnx;}}
以下类或者接口定义中正确的是()。 A: publicclassA{privateintx;publicintgetX(){returnx;}} B: publicabstractclassA{privateintx;publicabstractintgetX(){returnx;}publicabstractintaMethod();} C: publicclassa{privateintx;publicabstractintgetX();} D: publicinterfaceinterfaceA{privateintx;publicintgetX(){returnx;}}
publicclassA1{publicA1(){System.out.println(hello);}}publicclassA2extendsA1{publicA2(){System.out.println(world);}}publicclassA3extendsA2{publicA3(){System.out.println(china);}}publicclassB{publicstaticvoidmain(String[]args){A1 ৠቹ ቹ뗐敔 敔ৠቹ�敘ৠቹﲘǛ瘓鞸ி
publicclassA1{publicA1(){System.out.println(hello);}}publicclassA2extendsA1{publicA2(){System.out.println(world);}}publicclassA3extendsA2{publicA3(){System.out.println(china);}}publicclassB{publicstaticvoidmain(String[]args){A1 ৠቹ ቹ뗐敔 敔ৠቹ�敘ৠቹﲘǛ瘓鞸ி
publicclassA1{publicdoublefunc1(doublei,doublej){returni+j;}}publicclassA2extendsA1{publicdoublefunc1(doublei,doublej){returni+j+10;}}publicclassA3extendsA2{publicdoublefunc1(doublei,doublej){returni+j+20;}}publ ৠቹ ቹ뗐敔 敔ৠቹ�敘ৠቹﲘǛ瘓轸ி 㰰ǚ 㰰ǚ ብ盂ீЀ 痰ብ盂 Ѐ 㰰ǚ睽Ԝ盜Љ 䕄Ȓ ୰ቹء盜 ᤀ 澈ঝ ꋔȒ ᩄ ᬜ摐൰
publicclassA1{publicdoublefunc1(doublei,doublej){returni+j;}}publicclassA2extendsA1{publicdoublefunc1(doublei,doublej){returni+j+10;}}publicclassA3extendsA2{publicdoublefunc1(doublei,doublej){returni+j+20;}}publ ৠቹ ቹ뗐敔 敔ৠቹ�敘ৠቹﲘǛ瘓轸ி 㰰ǚ 㰰ǚ ብ盂ீЀ 痰ብ盂 Ѐ 㰰ǚ睽Ԝ盜Љ 䕄Ȓ ୰ቹء盜 ᤀ 澈ঝ ꋔȒ ᩄ ᬜ摐൰
publicclassA{publicdoublefunc1(inti,intj){returni+j;}publicdoublefunc1(doublei,doublej){returni+j+10;}publicdoublefunc1(floati,floatj){returni+j+20;}publicdoublefunc1(longi,longj){returni+j+30;}}publicclassB ৠቹ ቹ뗐敔 敔ৠቹ�敘ৠቹﲘǛ瘓轸ி 㰰ǚ 㰰ǚ ብ盂ீЀ 痰ብ盂 Ѐ 㰰ǚ睽Ԝ盜Љ 䕄Ȓ ୰ቹء盜 ᤀ 澈ঝ
publicclassA{publicdoublefunc1(inti,intj){returni+j;}publicdoublefunc1(doublei,doublej){returni+j+10;}publicdoublefunc1(floati,floatj){returni+j+20;}publicdoublefunc1(longi,longj){returni+j+30;}}publicclassB ৠቹ ቹ뗐敔 敔ৠቹ�敘ৠቹﲘǛ瘓轸ி 㰰ǚ 㰰ǚ ብ盂ீЀ 痰ብ盂 Ѐ 㰰ǚ睽Ԝ盜Љ 䕄Ȓ ୰ቹء盜 ᤀ 澈ঝ
for i in range(b.max_row): for j in range(b.max_column): print(b.cell(row=i,column=j).value)上面语句运行的结果是:__________。 A: 1 1 1 1 1 1 1 1 1 1 B: 1111111111 C: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D: 出现异常
for i in range(b.max_row): for j in range(b.max_column): print(b.cell(row=i,column=j).value)上面语句运行的结果是:__________。 A: 1 1 1 1 1 1 1 1 1 1 B: 1111111111 C: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D: 出现异常
【单选题】CDMA通信的基站,假定基站A的码片序列是+1 +1 +1 -1 -1 +1 -1 -1,基站发射bit为101时,实际发射的信号是 A. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 B. +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 C. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 D. –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1
【单选题】CDMA通信的基站,假定基站A的码片序列是+1 +1 +1 -1 -1 +1 -1 -1,基站发射bit为101时,实际发射的信号是 A. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 B. +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 C. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 D. –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1
for i in range(1,11): for j in range(1,11): b.cell(row=i,column=j).value=1 #b是一个工作表对象for i in range(1,11): for j in range(1,11): print(b.cell(row=i,column=j).value,end=" ") print()上面程序代码运行的结果是()。 A: 1 B: 1 1 1 1 1 1 1 1 1 1 C: 1111111111 D: 1 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1
for i in range(1,11): for j in range(1,11): b.cell(row=i,column=j).value=1 #b是一个工作表对象for i in range(1,11): for j in range(1,11): print(b.cell(row=i,column=j).value,end=" ") print()上面程序代码运行的结果是()。 A: 1 B: 1 1 1 1 1 1 1 1 1 1 C: 1111111111 D: 1 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1
下列哪个码片序列不能用于CDMA通信 A: ( -1 -1 -1 +1 +1 -1 +1 +1 ) B: ( -1 -1 +1 -1 +1 +1 +1 -1 ) C: ( -1 +1 -1 +1 +1 -1 -1 -1 ) D: ( -1 +1 -1 -1 -1 -1 +1 -1 )
下列哪个码片序列不能用于CDMA通信 A: ( -1 -1 -1 +1 +1 -1 +1 +1 ) B: ( -1 -1 +1 -1 +1 +1 +1 -1 ) C: ( -1 +1 -1 +1 +1 -1 -1 -1 ) D: ( -1 +1 -1 -1 -1 -1 +1 -1 )
请仔细观察下面行列式的计算过程,如果四个等号都理解了,请选择A,否则请选择B。 | a 1 1 1 1 | |a+4 a+4 a+4 a+4 a+4| | 1 a 1 1 1 | | 1 a 1 1 1 | | 1 1 a 1 1 |= | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 a | | 1 1 1 1 1 | | 1 a 1 1 1 | =(a+4) | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 1 | | 0 a–1 0 0 0 | =(a+4) | 0 0 a–1 0 0 | | 0 0 0 a–1 0 | | 0 0 0 0 a–1 | =(a+4)(a–1)^4
请仔细观察下面行列式的计算过程,如果四个等号都理解了,请选择A,否则请选择B。 | a 1 1 1 1 | |a+4 a+4 a+4 a+4 a+4| | 1 a 1 1 1 | | 1 a 1 1 1 | | 1 1 a 1 1 |= | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 a | | 1 1 1 1 1 | | 1 a 1 1 1 | =(a+4) | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 1 | | 0 a–1 0 0 0 | =(a+4) | 0 0 a–1 0 0 | | 0 0 0 a–1 0 | | 0 0 0 0 a–1 | =(a+4)(a–1)^4