下列不属于免疫抑制作用的抗生素是（）
A、环抱菌素A
B、放线菌素
C、古曲霉素
D、制霉霉素
参考答案：B, C, D
He told me that his aim was ________ a job around here to support himself while he studied in the university these years.
A．to get
B．getting
C．got
D．get
H.S编码有5264个子目，子目号由( )位数字组成。
A．4 B．5 C．6 D．7
