下列各种疾病中哪项与雌激素无关
A.子宫内膜癌B.子宫内膜增殖症C.卵巢颗粒细胞瘤D.卵巢无性细胞瘤E.子宫肌瘤
参考答案:D
–What was your brother doing at this time yesterday?
–He was reading a magazine ________ I was writing an e-mail at home.
A.as soon as
B.after
C.until
D.while
在产品生命周期的()阶段,促销显得十分重要。
A.成熟期
B.引入期
C.引入期和成熟期
D.成长期