有关雷击伤说法哪个是错误的()?
A.雷击伤可出现皮肤闪电纹
B.可造成心跳停止
C.雷击放电时间约为100~500ms
D.可造成鼓膜穿孔,视网膜剥离
参考答案:C
—What did he say just now? —He wondered___________________.
A.when he can join us
B.that he could join us
C.when could he join us
D.whether he could join us or not
设施未发生损坏,若进行了年度、季(月)度计划外的试验和检查,计为“()”