皮皮学，免费搜题
登录
搜题
【单选题】
室性期前收缩的心电图表现是( )A.
提前出现增宽的QRS波
B.
提前出现畸形的P波
C.
提前出现正常的QRS波
D.
推迟出现增宽的QRS波
E.
以上均不是
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】To make the tourists feel at home, the tour guide should not be ( )
A.
considerate
B.
responsible
C.
dull
D.
good at history
【单选题】The tour guide finally managed to make the visitors ______ of the safety of the bungee jumping. [ ]
A.
to convince
B.
convincing
C.
convinced
D.
convince
【简答题】Why does the tour guide ask the tourists to double check their bags? To make sure no bags have been left ______。