题目

动脉中流的是动脉血，静脉中流的是静脉血。（____） 答案：【答案】错【解析】判断动脉血和静脉血的依据是看含氧量的多少。区分动脉血和静脉血主要看血液中氧的含量和颜色。动脉血含氧丰富，颜色鲜红；而静脉血含氧量少，颜色暗红。题中“动脉里流动的是动脉血，静脉里流动的是静脉血。”这句话是错误的，因为肺动脉流的是静脉血，而经过肺的气体阅读下列短文，从每小题的三个选项中选出最佳选项。This is Bob. He is a pupil. He goes to school from Monday to Friday. He gets up at a quarter to seven in the morning. Then he brushes his teeth, washes his face and has breakfast. He goes to school at half past seven in the morning. After school, he goes home. He does his homework(家庭作业) at a quarter past five in the afternoon. He has dinner at half past six in the evening. He watches TV(看电视) at eight o'clock at night. He goes to bed at a quarter past nine at night.（1）Bob gets up at in the morning.A.a quarter to sevenB.a quarter past sevenC.half past seven（2）He at half past seven in the morning.A.washes his faceB.goes to schoolC.has breakfast（3）Does Bob have dinner at half past six in the evening?A.No, he doesn't.B.Yes, he is.C.Yes, he does.（4）Bob goes to school from Monday to .A.ThursdayB.SaturdayC.Friday