【单选题】在Java中,下列关于读写文件的描述错误的是?
A.
Reader类的read()方法用来从源中读取一个字符的数据
B.
Reader类的read(int n )方法用来从源中读取一个字符的数据
C.
Writer类的write(int n)方法用来向输出流写入单个字符
D.
Writer类的write(String str)方法用来向输出流写入一个字符串
【判断题】测量电阻时要断开电源,不是因为安全问题,而是连接电源会引起电阻测量的较大误差。
【单选题】The bank clerk at the counter did not know the' customer and ______ the large amount of money involved was naturally cautious about paying out the sum on the cheque.
【单选题】Fortunately, the bank clerk ______ press the alarm button before the robbers got away.
【判断题】The bank clerk issued a deposit book and a bank card to the
【多选题】When you compare the differences between half-duplex and full-duplex Ethernet,which of the following characteristics are exclusive to half-duplex?()
A.
Half-duplex Ethernet operates in a shared collision domain.
B.
Half-duplex Ethernet operates in an exclusive broadcast domain.
C.
Half-duplex Ethernet has efficient throughput.
D.
Half-duplex Ethernet has lower effective throughput.
E.
Half-duplex Ethernet operates in an exclusive collision domain.
【单选题】The bank clerk listened carefully _______ he could discover exactly what the client wanted.
【单选题】下列关于Java I/O中字符输入流Reader类中的read方法描述错误的是
A.
read() 方法的返回值类型为 char 类型
B.
read() 方法的返回值类型为 int 类型
C.
read() 方法的返回值如果为 -1, 表示到流的末尾
D.
read(char[] cbuf) 方法表示将读到的多个字符存入字符数组 cbuf 中