下列哪一项最有可能产生假性胎囊超声图像()
A.卵黄囊
B.黄体囊肿
C.子宫蜕膜管型
D.盆腔炎性包块
E.卵巢实性肿瘤
参考答案:C
The less the surface of the ground yields to the weight of the body of a runner, ________ to the body.
A.the stress it is greater
B.greater is the stress
C.greater stress is
D.the greater the stress
药用真菌分离方法可分为3种,即()、()和寄主分离。应用较多的是组织分离。