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【单选题】
若全集U={x∈R|x 2 ≤4}，则集合A={x∈R||x+1|≤1}的补集C U A为 [ ]A.
{|x∈R|0＜x＜2|}
B.
{|x∈R|0≤x＜2|}
C.
{|x∈R|0＜x≤2|}
D.
{|x∈R|0≤x≤2|}
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举一反三
【单选题】The subject (主语)of the sentence “According to the statistical data by the World Trade Organization, China will have become the world's largest tourism country by 2020.” is _____________
A.
the statistical data
B.
World Trade Organization
C.
China
D.
the world's largest tourism country
【多选题】关于混凝土取样与试块留置的说法，正确的有______。
A.
用于检查结构构件混凝土强度的试件，应在混凝土运至施工现场浇筑首方灰时抽取
B.
当一次连续浇筑超过1000m3时，同一配合比的混凝土每200m3取样不得少于一次
C.
每一楼层、同一配合比的混凝土，取样不得少于一次
D.
每次取样都必须留置标准养护试件，至少一组
E.
每次取样都必须留置同条件养护试件，至少三组
【单选题】In 1995 China ranked ______ in the world in terms of tourism dollars.
A.
sh
B.
eighth
C.
ninth
D.
tenth
【单选题】The writer concludes that tourism in the Third World ______.
A.
produces only limited economic benefits
B.
amounts to a present-day form. of colonialism
C.
is developed at the expense of other industries
D.
will bring prosperity to it only in the distant future
【简答题】Part B Below is a graph showing China’s Tourism Ranking in the world. Look at the graph and write an essay of about 150 words. China’s Tourism Ranking in the World
【单选题】Tourism, _____ it brings in money to a country, can also result in damage to the World Heritage sites there. [ ]
A.
because
B.
as
C.
while
D.
since
【单选题】在假设检验中，统计检验的显著性水平 α 的值是
A.
犯 I 型错误的概率
B.
犯 II 型错误的概率
C.
犯 I 型与犯 II 型错误的概率之和
D.
犯 I 型与犯 II 型错误的概率之差
【简答题】With the______(develop)of tourism, more and more people are traveling all over the world．
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