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
----- Do you play _________ piano in your free time? ----- No, I like sports. I often play ________ soccer with my classmates.
#34199
A
/; the
B
the; /
C
the; the
D
a; a
Frank wanted to learn to play _______ guitar, but he didn’t have _______ guitar.
#34618
A
the ; the
B
a ; the
C
the ; a
D
a ; a
--Do you play _______ piano in your free time?---No, I like sports. I often play______ soccer with my friends.
#34593
A
/; the
B
the ;/
C
the ; the
D
a; a
The boy _______ Ling Feng in the school is really _______ unusual student.
#34300
A
called; a
B
calling; a
C
called; an
D
calling; an