STM-N帧结构中,B1字节的个数是();B2字节的个数是()。
参考答案:1;3*N
—Oh, come on. Just ____________. Nothing can beat me.
—Well, to be frank, you should rewrite your essay.
A.come to the point
B.take your time
C.take your turn
D.don’t hesitate
小儿伤寒的临床特点()
A.年龄越小症状越不典型
B.热型不规则
C.无相对缓脉
D.白细胞减少
E.肠出血与肠穿孔多见