准高速车辆的承载方式与普通车辆不同,普通车辆是以()承载,准高速车辆是以旁承承载。
参考答案:心盘
people in the world are sending information by E-mail every day.
A.Several million
B.Many millions
C.Several millions
D.Many million
(描述疾病流行强度)暴发的概念。