接种疫苗后出现的过敏性皮疹中最多见的为()
A.猩红热样红斑
B.麻疹样红斑
C.荨麻疹
D.固定性红斑
E.风疹
参考答案:C
加油时,打开加油阀的步骤是()。
A、开油冷却器出口阀
B、启动油泵
C、打开喷油阀
D、关闭进油阀
A, B, and C each drove 100-mile legs of a 300-mile course at speeds of 40, 50, and 60 miles per hour, respectively. What fraction of the total time did A drive ?()
A.A
B.B
C.C
D.D
E.E