一次性给动物注射毒物,经过3个月生物半衰期后,该毒物在体内的蓄积量为( )。
A.87.5%
B.75%
C.5%
D.25%
E.12.5%
参考答案:A
根据短文内容及首字母提示完成所缺的单词.。
Ken's father is very happy because hell have a b 1 job and work in a
different p 2 of Hong Kong soon. So Ken and his brothers will have to
change s 3 next year. But Sam's father isn't so happy because he will have to m 4 to a bigger apartment in Shanghai, which will be e 5 . But then there
will be more room for the new baby-a brother or sister f 6 Sam. The
apartment will a 7 be very near to Sam's school so he can w 8 to school
with Blackie, his guide dog. Ken wants a dog, too. But his parents w 9 buy one from a pet shop. They'll look for o 10 in an animal shelter(动物收容站).
1.______ 2._______ 3._______ 4._______ 5. _______
6. _____ 7.______ 8._______ 9. ______ 10._______
生聚系数