She likes potatoes, and I potatoes, . [ ]
A. like, to
B. like, too
C. likes, to
答案:B
估算21×79时,把21看做( ),把79看做( ),21×79≈( )。
仪器箱用于仪器的装载运输及保管,()严禁踩、坐在仪器箱上。
A、因承重有限
B、因重量轻
C、因体积小
D、因受力面小