罐车主要由哪些部件组成?
参考答案:
罐车主要由罐体装配、牵枕装配、制动装置、车钩缓冲装置、转向架及安全附件等组成。
在8086处理器中,当前段寄存器的内容为FFFFH,偏移地址为OOOOH,则其对应的内存物理地址为______。
A.FFFFH B.FFFFOH C.FFFFOOOH D.FFFFOOH
My uncle is a writer. He ______ many books since he was young.
A.writes
B.wrote
C.is writing
D.has written