【单选题】I don’t know why you always ________ about the food here.
【单选题】农药可对人体神经系统、血液系统、呼吸系统以及肝脏、肾脏等器官系统产生直接损害,而且农药在体内蓄积不易排出,当达到一定量时可导致急性或慢性中毒,危害人体健康甚至威胁生命安全。例如早期使用的有机磷农药对人或哺乳动物有较大的毒性,大量接触或摄入可致急性中毒甚至死亡。而且,一些农药还可通过胎盘进入胎儿体内并具有一定致畸性。此外,农药也是人体致癌、致突变等的根源之一。 以下对文段理解正确的是:
C.
有机磷农药可通过胎盘进入胎儿体内导致胎儿畸形
【判断题】若函数f为闭区间上的连续函数,则该函数在该闭区间上每一点一定可导。
【判断题】若函数f为闭区间上的连续函数,则该函数在该闭区间上一定可积。
【单选题】Could you _____ why you always come to work late? [ ]
【简答题】A.They should wait patiently. B.They should ask that man to leave. C.That man is old enough to order things he likes. D.They should serve that man immediately.
【简答题】A.They should wait patiently. B.They should ask that man to leave. C.That man is old enough to order things he likes. D.They should serve that man immediately.
【单选题】患者男20岁,口舌生疮,面赤口渴,心烦失眠,舌红脉数,宜选: