绒毛膜促性腺激素的分泌量达高峰的时间是
A. 停经11~15天
B. 妊娠8~10周
C. 妊娠16周
D. 妊娠32~34周
E. 临产时
正常足月妊娠,子宫腔容量平均比未孕时增加
A. 100
B. 300
C. 500
D. 800
E. 1000
What are the letter or letters that can be pronounced as /3:/?
A. e
B. ear
C. er
D. o
What are the letter or letters that can be pronounced as /ə/?
A. a
B. e
C. i
D. o