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问题
单项选择题
()在性器期十分活跃的幼儿在此阶段潜伏下去,男女孩分别只与同性为伍,他们都尽量避免性的表现。
A、口欲期
B、肛欲期
C、性器期
D、潜伏期
答案
参考答案:D
填空题
选择反义词填空。
tall strong thin long small
1. Mike has short hair. Amy has
hair.
2. I'm short. My mother is
.
3. Xiaoming is thin. Zhang Peng is
.
4. She has big eyes, but I have
eyes.
5. The elephant is fat. The monkey is
.
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问答题 简答题
简述波浪能量损失?
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