结肠癌最早出现的症状是______
A．腹痛B．排便习惯及粪便性状改变C．腹部肿块D．全身症状E．肠梗阻
参考答案：B
下列句子中加点的词与例句中加点词用法相同的一句是（ ）
例句：知我不羞小节
A．既来之，则安之
B．召忽死之
C．公子怪之
D．以身下之
It was quite a serious mistake, ____caused by carelessness.
A．which I think was
B．I think which was
C．which I think it was
D．I think which it was
