Computers are powerful tools which perform fast， accurate calculations over huge sets of data.该句表达了一个客观情况因此使用了
Computers are powerful tools which perform fast， accurate calculations over huge sets of data.该句表达了一个客观情况因此使用了
A.一般过去时
B.一般现在时
C.现在完成时
D.现在进行时
正确答案：一般现在时