Task 1 Listen to a passage. Fill in the blanks with the information you have heard.[音频][img=590x243]17e0c57aa95a8fe.png[/img][img=612x289]17e0c57ab76466b.png[/img]

2022-06-06

答案：

spring water#large quantities#safe alternative#improved the safety#popularity#declined#1970s#launched#advertising campaign#huge

0
函数[img=103x33]17e0b09051e076c.jpg[/img]的反函数是未知类型：{'options': ['y=1-3cosx,x[img=6x11]17e0b0905fe87f4.jpg[/img][0,[img=8x11]17e0a7285a871a0.jpg[/img]]', ' y=1+3cosx,x[img=6x11]17e0b0905fe87f4.jpg[/img][0,[img=8x11]17e0a7285a871a0.jpg[/img]]', ' y=1-3sinx,x[img=6x11]17e0b0905fe87f4.jpg[/img][0,[img=8x11]17e0a7285a871a0.jpg[/img]]', ' y=1+3sinx,x[img=6x11]17e0b0905fe87f4.jpg[/img][0,[img=8x11]17e0a7285a871a0.jpg[/img]]'], 'type': 102}
1
Unit 3-Exercise 15: Sports P47[音频]Listen to the talk and fill in the missing information in the right place.[img=911x362]17e446868a63217.png[/img]
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Listening:Task 2: Listen to the dialogue and fill in the blanks with the information you hear.
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下列4个集合中是空集的是（） A: ｛x|[img=18x22]1802f060e2f728f.png[/img]+1=0｝ B: ｛x|[img=18x22]1802f060e2f728f.png[/img]<-x｝ C: ｛x|[img=18x22]1802f060e2f728f.png[/img]=0｝ D: ｛x|[img=18x22]1802f060e2f728f.png[/img]-1=0｝
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下列4个集合中是空集的是（） A: ｛x|[img=18x22]1803d021d498831.png[/img]+1=0｝ B: ｛x|[img=18x22]1803d021d498831.png[/img]<-x｝ C: ｛x|[img=18x22]1803d021d498831.png[/img]=0｝ D: ｛x|[img=18x22]1803d021d498831.png[/img]-1=0｝

Task 1 Listen to a passage. Fill in the blanks with the information you have heard.&#91;音频&#93;[img=590x243]17e0c57aa95a8fe.png[/img][img=612x289]17e0c57ab76466b.png[/img]