()是一种连续的、高精度的、均匀的时间系统,它以原子秒为单位。
A.GPS时
B.天文时UT
C.协调世界时UTC
D.格林威治时
参考答案:A
Neither of them knows the difference ________ the two and neither can we tell one ________the other.
A.between; between
B.among; from
C.among; between
D.between; from
下列诱因中,易致新生儿败血症的是:()
A.母乳喂养不定时
B.人工喂牛奶
C.未定期洗澡
D.吸入感染羊水
E.及时更换尿布