问题
多项选择题
地滚波是指沿地表面或接近地表面传播的面波，其特点是（）。
A.较低速度
B.较高频率
C.较大振幅
答案
参考答案：A, C
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地滚波是指沿地表面或接近地表面传播的面波，其特点是（）。
A.较低速度
B.较高频率
C.较大振幅
参考答案：A, C
| 根据下面的文字，了解下Jeff和Julie一周中都做了些什么，然后选择图片，填入相应的表格里。 | |||||||
| Jeff is a very athletic(体格健壮的)person. He does a different kind of exercise or sport every day. On Monday he runs. On Tuesday he plays tennis. On Wednesday he does yoga(瑜珈). On Thursday he swims. On Friday he goes to a health club. On Saturday he plays basketball. And on Sunday he rides his bike. Julie is a very busy student. She does a different activity every day. On Monday, she sings in the choir(歌唱队). On Tuesday she plays the piano. On Wednesday she writes for the school newspaper. On Thursday she plays volleyball. On Friday she cooks at home. On Saturday she works at the shop and on Sunday she visits her grandparents. | |||||||
| Name | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
Jeff  | 1._____ | 2._____ | 3._____ | 4._____ | 5._____ | 6._____ | 7._____ |
Julie  | 8._____ | 9._____ | 10._____ | 11._____ | 12._____ | 13._____ | 14._____ |