猪发情后适宜的输精时间一般是发情后10-20h。()
参考答案:错
下列美国城市中高新技术产业最发达的是[ ]
A.洛杉矶
B.圣弗朗西斯科
C.纽约
D.休斯敦
阅读下面的短文,然后根据汉语或英语首字母提示写出所缺英语单词的正确形式。
I had a very unusual experience on小题1:星期天。At around ten o’clock in the morning, I was walking down the street when a UFO landed in 小题2:f_____ of me. You can imagine how小题3:奇怪的it was! An alien got out and walked down the Center Street. I 小题4:跟随it to see where it was going, and I was very surprised when it went into a souvenir shop. While it was looking at the souvenirs, the assistant called the 小题5:p_______.