人类的白细胞分化抗原是()
A.Lyt抗原
B.Ly抗原
C.CD抗原
D.HLA抗原
E.黏附分子
参考答案:C
防范黑客的主要措施包括()
A、通过制定相关法律加以约束
B、采用防火墙、防黑客软件等防黑产品
C、采用加密技术
D、访问控制
(A) 条件(1)充分,但条件(2)不充分. (B) 条件(2)充分,但条件(1)不充分. (C) 条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分. (D) 条件(1)充分,条件(2)也充分. (E) 条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.
A garden is surrounded by a path that is 4 feet wide. What is the area of the path (1) The area of the path is [*] of the area of the garden. (2) The garden is circular with a 12-foot diameter.