— How many English books can you see?
— __________________.[ ]
A. Yes
B. many
C. Five
答案:C
在氧化铜和铁粉的混合物中,加入一定量的稀硫酸并微热,反应停止后滤出不溶物,再向滤液中插入铁片,铁片上无变化,则滤液中( )
A.一定无硫酸铜,一定含有硫酸亚铁
B.一定无硫酸铜,可能含硫酸亚铁
C.一定含有硫酸亚铁和硫酸铜
D.一定含有硫酸亚铁,可能含有硫酸铜
I borrow the book Sherlock Holmes from the library last week, ______ my classmates recommended to me..
A.who
B.which
C.when
D.Where