该患者发病的易感因素是
A.感染使机体抵抗力降低B.可能有泌尿系统局部的损伤C.可能发生了尿路梗阻D.女性且处于妊娠期使内分泌发生改变易发病E.年龄因素
参考答案:D
太阳从( )边升起,从( )边落下。
It _____ Jack twenty minutes _____ the math problem yesterday. [ ]
A. took, to work out
B. takes, to work out
C. has taken, working out
D. is taking, working