最早钻油的是(),最早的油井是4世纪或者更早出现的。
A.美国人
B.印度人
C.中国人
参考答案:C
The Chinese lunar New Year usually ______ two records: the world’s most watched television gala show and its busiest telecommunications network.
A.develops
B.conducts
C.witnesses
D.launches
简述共同性内斜视与非共同性内斜视的鉴别?