加热器电源线铜丝截面积应大于或等于()mm2
A、6
B、10
C、16
参考答案:B
—We're going to travel around the world. — _______! [ ]
A. OK
B. That's true
C. Have a good time
D. That's nothing
与年长儿比较,婴幼儿上呼吸道感染的临床特点为()
A.以消化道症状为主
B.以呼吸道症状为主
C.以鼻咽部症状为主
D.全身症状轻
E.全身症状较重