计算机能直接执行的程序是( )。
A．源程序
B．机器语言程序
C．BASIC语言程序
D．汇编语言程序
参考答案：B
—The state of illness is complicated．We need an experienced doctor．
—Whom would you like to have____?
A．sent for
B．send for
C．to send for
D．been sent for
材料的吸湿性是指材料在水中吸收水分的性质。( )
