问题
选择题
The students entered the classroom, smiling and________, and________down to have their lessons. [ ]
A. talked; sat
B. talking; sitting
C. talking; sat
D. talked; sitting
答案
答案：C
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The students entered the classroom, smiling and________, and________down to have their lessons. [ ]
A. talked; sat
B. talking; sitting
C. talking; sat
D. talked; sitting
答案：C
以下提供若干个病例，每个病例下设若干道考题。请根据答案所提供的信息，在每一道考题下面的A、B、C、D、E 5个备选答案中选择一个最佳答案。
| 女，26岁。平素月经规律，停经45天。行人工流产术，术中见完整绒毛，术后至今已4周余， * * 仍淋漓出血。妇科检查：子宫饱满，稍软，活动好。彩色B超检查宫腔线清晰，前壁肌层有局灶性丰富血流信号。 |
尿HCG测定为阳性，最可能的诊断是
A．不全流产
B．排卵性月经失调
C．子宫肌瘤
D．侵蚀性葡萄胎
E．绒毛膜癌