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【单选题】
样本数据- 1,2,0, - 2, 1 的方差为A.
1
B.
2
C.
3
D.
5
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反馈参考答案：
举一反三
【单选题】The tour guide is
A.
announcing the arrangement for today's tour.
B.
expressing warm welcome to the tourists.
C.
giving advice to the tourists.
D.
introducing a famous scenic spot.
【简答题】我国的国家宪法日是每年的( )
【单选题】The tour guide is _____ visitors around the city.
A.
show
B.
showing
C.
shows
D.
showed
【单选题】The tour guide is a native in Pingyao. 以下哪个词与划线部分的词意义相同：
A.
local
B.
tourist
C.
assistance
D.
staff
【简答题】Being a tour guide is a very important job. In many cases, the tour guide is a traveller’ s first impression of (1) _______________ . In other cases a tour guide may be responsible for teaching touris...
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