心电图在正常窦性P波时,下列描述中不正确的是()。
A.Ⅰ导联直立
B.aVF导联直立
C.aVR导联直立
D.Ⅱ导联直立
E.V4~V6导联直立
参考答案:C
-Where would you like to go on vacation?
-I decided to spend three days _______the forest. [ ]
A. trek through
B. trek around
C. trekking through
D. trekking across
布设地下水监测点网时,哪些地区应布设监测点(井)?