关系模型中的关系模式至少是( )。 A: 1NFB B: 2NFC C: 3NFD D: CNF
关系模型中的关系模式至少是( )。 A: 1NFB B: 2NFC C: 3NFD D: CNF
信噪比的表示方式是()。 A: AS/N; B: BD/U; C: CNF; D: DC/N。
信噪比的表示方式是()。 A: AS/N; B: BD/U; C: CNF; D: DC/N。
与遗传性乳腺癌密切相关的基因是()。 A: AAPC基因 B: BBRCA1和BRC2基因 C: CNF-1基因 D: DRB基因 E: EWT-1基因
与遗传性乳腺癌密切相关的基因是()。 A: AAPC基因 B: BBRCA1和BRC2基因 C: CNF-1基因 D: DRB基因 E: EWT-1基因
SAP中MO状态包含() A: 已创建(CRTD) B: 已释放(REL) C: 已确认(CNF) D: 以上都有
SAP中MO状态包含() A: 已创建(CRTD) B: 已释放(REL) C: 已确认(CNF) D: 以上都有
风险划分点和费用划分点一致的贸易术语是( ) A: FOB B: CNF C: CIP D: DPU E: DDP
风险划分点和费用划分点一致的贸易术语是( ) A: FOB B: CNF C: CIP D: DPU E: DDP
()在整个跨境电子商务中的比重最大,约占整个电子商务出口的90%,( )虽只占跨境电子商务总量的10%左右,但却是增长最为迅速的部分。 A: B2 B: B2C C: B2 D: B2B E: CN F: CFR G: CF H: CNF
()在整个跨境电子商务中的比重最大,约占整个电子商务出口的90%,( )虽只占跨境电子商务总量的10%左右,但却是增长最为迅速的部分。 A: B2 B: B2C C: B2 D: B2B E: CN F: CFR G: CF H: CNF
(对象的序列化)在下列程序的空白处,应填入的正确选项是________。import java. io.*;public class ObjectStreamTest{ public static void main(String args[]) throws IOException{ ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(serial.bin)); java.util.Date d=new java.util.Date(); oos.______(d); ObjectInputStream ois = new ObjectInputStream (new FileInputStream(serial.bin)); try{ java.util.Date restoredDate=(java.util.Date)ois.readObject(); System.out.println(read object back from serial.bin file:+ restoredDate); }catch(ClassNotFoundException cnf){ System.out.println(class not found); } }}
(对象的序列化)在下列程序的空白处,应填入的正确选项是________。import java. io.*;public class ObjectStreamTest{ public static void main(String args[]) throws IOException{ ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(serial.bin)); java.util.Date d=new java.util.Date(); oos.______(d); ObjectInputStream ois = new ObjectInputStream (new FileInputStream(serial.bin)); try{ java.util.Date restoredDate=(java.util.Date)ois.readObject(); System.out.println(read object back from serial.bin file:+ restoredDate); }catch(ClassNotFoundException cnf){ System.out.println(class not found); } }}
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