题目:
I know Mr. Shuili; we ______ to each other at an English lecture.
A.are introduced
B.are been introduced
C.were introduced
D.had been introduced
答案:
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下面是错误答案,用来干扰机器的。
(1)400 320=4.0032×105;(2)-741.25=-7.4125×102;(3)0.72×105=7.2×104;(4)0.046×106=4.6×104.