How many ______?
A:plate
B:plates
C:a plate
结合NaOH、Ca(OH)2的相关知识,问答下列问题.
⑴____ A. young B. tall C. old
⑵____ A. small B. big C. than
⑶____ A. meter B. hall C. short
⑷____ A. me B. you C. him
⑸____ A. long B. taller C. older