管理和控制计算机系统软硬件资源的软件是_______

单项选择题Microsoft的IE是一种_______

单项选择题计算机能直接执行的程序是_______

单项选择题在表示存储器的容量时，1M的准确含义是_______

单项选择题The vision of that big black car hitting the sidewalk a feW feet from us will never be_______from my memory．

单项选择题The author was required to submit an_______of about 200 words together with his research paper．

单项选择题Everybody was touched_______words after they heard her moving story．

单项选择题Some plants are very_______to light；they perfer the shade．

单项选择题The children all turned_______the famous actress as she entered the classroom．

单项选择题His sister left home in 1998，and_______since．