图例在给水排水施工图中表示()。
A.雨水口
B.清扫口
C.存水弯
D.检查口
参考答案:B
下列叙述中属于动物先天性行为的是( )
①草履虫游向牛肉汁
②蟋蟀鸣叫
③蜜蜂采花蜜
④鹦鹉学舌
⑤八哥说话
⑥警犬搜寻毒品.
A.①②③
B.①③⑤
C.②④⑥
D.③④⑥
Read and answer.
1. Do you have a cold today?
2. Are you happy now?
3. How tall are you?
4. How heavy are you?