肌内注射时，选用联线法进行体表定位，其注射区正确的是

A．髂嵴和尾骨联线的外上1/3处
B．髂嵴和尾骨联线的中1/3处
C．髂前上棘和尾骨联线的外上1/3处
D．髂前上棘和尾骨联线的中1/3处
E．髂前上棘和尾骨联线的后1/3处

The number of the students in senior high school, ____ is mentioned above, is increasing.

A．as

B．which

C．what

D．who