静电能够引起火灾爆炸的原因,在于静电放电火花具有().
A.点火温度
B.点火作用
C.点火能量
D.点火极限
参考答案:C
.Why !I have nothing to confess。________you want me to say?
A.What is it that
B.What it is that
C.How is it that
D.How it is that
人体成熟的血细胞中不具有细胞核的一组是()
A.血小板和白细胞
B.白细胞和红细胞
C.红细胞和血小板
D.红细胞、白细胞和血小板