膀胱三角系指
A．膀胱底部两侧至膀胱颈B．膀胱底部两侧壁至膀胱颈C．膀胱顶部至膀胱颈D．膀胱底部两侧输尿管开口至膀胱颈E．以上都不是
参考答案：D
用画线部分的反义词或对应词填空。
1. Please ask and _____ the questions.
2. This is a pig. _____ is a dog.
3. He came here at 6:00. I _____ there at 8:00.
4. English is hard. Chinese is _____ .
5. Mothers are _____. Fathers are men.
A．+→
B．→+
C．+→
D．→+
+
→
→
+
+
→
→
+
