下列说法不正确的是[ ]
A.0既是正数也是负数
B.0是整数
C.0的相反数是0
D.0的绝对值是0
答案:A
(2013·河北普通高中高三质量监测)While working outdoors, Linda was ________ by the heat and fell to the ground, unconscious.
A.astonished
B.depressed
C.overcome
D.hit
下列哪些是工业电雷管的主要性能参数?()
A.电阻
B.最大安全电流
C.最小发火电流
D.重量