目前目视法计算红细胞的最佳稀释液是()。
A.Hayem液
B.甲醛枸橼酸盐稀释液
C.生理盐水
D.1%甲醛生理盐水
E.蒸馏水
参考答案:A
某质点沿直线运动的v-t图像如图所示,由图像可知( )
A.前2秒钟物体做匀速直线运动
B.3秒末物体速度为6 m/s
C.前5秒物体的位移为30 m
D.5秒末物体返回出发点
根据下列句子及所给单词的首字母写出所缺单词。在填写答卷时,要求写出完整单词。 (每空限填一词)
小题1:He is very smart.He went to university at the a of 15.
小题2:Never cross the street when the traffic lights are r .Wait until it’s green.
小题3:It doesn’t look like rain,so you needn’t b your umbrella with you.
小题4:I miss my family and really feel l without any friends in this new city.
小题5:Where is my watch?I can’t f it.