题目

下列关于人类遗传病的叙述，正确的是A. 通过羊水检查可确定胎儿是否患某种染色体异常遗传病B. 通过遗传咨询可了解遗传病的遗传方式并计算其在人群中的发病率C. 调查发病率应对多个患者家系进行调查，以获得足够大的群体调查数据D. 调查结果显示该病女性发病率明显高于男性，则此病可能为伴X隐性遗传 ______left before the deadline, it doesn’t seem likely that John will finish the job. A. Though such a short time  B. Because such a short time C. With such a short time    D. As such a short time