洋地黄中毒引起的心律失常最常见的是（）
A.房性期前收缩
B.室性期前收缩
C.室上性心动过速
D.室性心动过速
E.房室传导阻滞
参考答案：B
(2013·高考新课标全国卷Ⅰ)The driver wanted to park his car near the roadside but was asked by the police________.
A．not to do
B．not to
C．not do
D．do not
发盘在其生效前是可以修改或撤回的。 ( )
