胎儿血液循环，卵圆孔的血流方向是
A．自左房向右房B．自右房向左房C．自右房向右室D．自主动脉向肺动脉E．自肺动脉向主动脉
参考答案：B
句型转换。
1. She lived in New Zealand. (对划线部分提问)
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2. Anne and her friends are playing in the snow. (对划线部分提问)
3. There are twelve month in a year. (对划线部分提问)
4. It's cool in autumn. (同义句)
5. He bought a new house in 2000. (否定句)
具有HIV感染特异性的体征是
A．毛细血管扩张征
B．淡紫色或棕色斑
C．口腔毛状黏膜白斑
D．玫瑰疹样皮疹
E．脂溢性皮炎
