托法分为____和____两种。
参考答案：补托；透托
In today’s world, being able to speak more than one language, including English, is ______ you stand out and get ahead.
A．what
B．that
C．which
D．how
HIV主要感染
A．神经胶质细胞
B．CD4T淋巴细胞
C．单核细胞
D．B淋巴细胞
E．皮肤上皮细胞
