地球公转的周期是 A．24小时 B．一年 C．72小时 D．12小时 发布时间：2017-04-25 04:37 │ 来源：www.tikuol.com 题型：选择题 问题： 地球公转的周期是A．24小时B．一年C．72小时D．12小时
题型：选择题 选择方框内合适的词，并用其适当形式填空。health foot good eat hear ill two west tooth 1. Tom didn't go to school because of his _____. 2. Have you been to a _____ restaurant? I like going there. 3. We must brush our _____ after getting up every morning. 4. —Which would you like _____, an apple, a banana, or a pear? — A banana. 5. Li Lei is the _____ of all in our class. He exercises every morning. 6. My grandpa's _____ habits are pretty good, so he's very healthy. 7. Lucy often washes her _____ with hot water before she goes to bed.8. —Have you _____ our teacher is ill? —No, not yet.9. —How many times have you been to the Great Wall? —____ only. 查看答案
题型：选择题 在一个局部地区或集体单位中，短时间内突然有很多相同的病人出现。这些人多有相同的传染源或传播途径。大多数病人常同时出现在该病的最长潜伏期内，该情况属于A．散发B．暴发C．流行D．大流行E．大暴发 查看答案