皮皮学，免费搜题
登录
搜题
【简答题】
A．One hour. B．Two hours. C．Three hours. D．Four hours.
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The early travelers reported that the length of the day changed with what we call ____ .
A.
multicultural
B.
circumference
C.
ambiguity
D.
latitude
【单选题】What is a hospital-acquired infection?
A.
Functional infection
B.
Iatrogenic infection
C.
Idiopathic infection
D.
Nosocomial infection
E.
Organic infection
【简答题】PLC的工作原理,概括而言,PLC是按集中输入、集中输出,周期性( )的方式进行工作的。A. 并行扫描 B. 循环扫描 C. 一次扫描 D. 多次扫描
【简答题】感染源(souce of infection)
【单选题】For most people the sea was remote, and with the exception of early intercontinental travelers or others who earned a living from the sea, there was little reason to ask many questions about it, let a...
A.
asking
B.
ask
C.
to ask
D.
be asked
【简答题】abortive infection
相关题目：