以下哪条与磁罗盘的罗差定义不符().
A.飞机上的飞机磁场引起的
B.罗航向和磁航向之差
C.由飞机硬铁磁场和软铁磁场引起的
D.磁子午线与真子午线之差
参考答案:D
—Do:you often see William _ __ _ on the playground?
—No, but he is often seen _____ Chinese kung fu in the park. [ ]
A. run, do
B. run, to do
C. running, do
D. running, to do
下列哪一种反应不属于继发反应()
A.广谱抗菌药物所致菌群失调
B.广谱抗菌药物所致二重感染
C.维生素B缺乏而致口腔炎
D.维生素K缺乏而致出血
E.阿司匹林诱发Reye综合征