This is 3-D printer. And this is an artificial (人工的) ear. Can you believe that scientists printed this artificial ear by this 3-D printer?
#33175
A
a
B
an
C
the
D
/
推荐题目
The second Sunday of May is ________ Mother’s Day. It’s ________ special day for children to show their love for their mothers.
#33570
A
a；the
B
the；a
C
不填；a
D
不填；the
The boy _______ Ling Feng in the school is really _______ unusual student.
#34300
A
called; a
B
calling; a
C
called; an
D
calling; an
— Sandy, _______ apple on the table is for you. Have it before you go out.—Thanks, Mum. _____ apple a day keeps the doctor away.
#32805
A
the; An
B
an; An
C
an; The
D
the; The
Tim, do you have _________ soccer ball? Let’s play ________ soccer together.
#32391
A
a; a
B
an; the
C
the; /
D
a; /