阑尾动脉来源于
A．右结肠动脉
B．中结肠动脉
C．肠系膜下动脉
D．肠系膜上动脉
E．回结肠动脉
参考答案：E
根据句意和所给中文写出句中所缺的单词。
1. If you have a _____ (机会) to go, take it.
2. Do you know the saying, "Practice makes _____ (完美的)."
3. She went to Beijing with the _____ (目的) of learning from the teachers
there.
4. He is here in body, but not in _____ (精神).
5. Shall I _____ (记录) what he says?
大量元素
, "Practice makes _____ (完美的)."
.