马齿苋是水稻田最常见杂草之一,其种籽为()类,圆锥形,盖裂。种子肾状卵形,黑色,表面有瘤状突起。 ["瘦果","蒴果","胞果","荚果"]
装饰层
患者,女,28岁,平素月经周期2~8天,近半年经期逐渐延长,此次行经12天干净,经量时多时少,经血紫黯有块,经行小腹疼痛拒按,舌质紫黯,伴有瘀点,脉弦涩,其诊断为() ["气滞血瘀型经期延长","气虚型经期延长","血热型经期延长","虚热型经期延长","血瘀型经期延长"]
为防滑系统提供速度信号的传感器为()。 ["牵引电机速度传感器","车轴速度传感器","双针表速度传感器"]
病变好发于直肠和乙状结肠的是() ["肠结核","肠梗阻","克罗恩病","结核性腹膜炎","溃疡性结肠炎"]
滚动轴承车轴无轴领,而()轴承车轴有轴领。