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【简答题】
下列命题： ①函数y=sin（2x+ π 3 ）的单调减区间为[kπ+ π 12 ，kπ+ 7π 12 ]，k∈Z； ②函数y= 3 cos2x-sin2x图象的一个对称中心为（ π 6 ，0）； ③函数y=sin（ 1 2 x- π 6 ）在区间[- π 3 ， 11π 6 ]上的值域为[- 3 2 ， 2 2 ]； ④函数y=cosx的图象可由函数y=sin（x+ π 4 ）的图象向右平移 π 4 个单位得到； ⑤若方程sin（2x+ π 3 ）-a=0在区间[0， π 2 ]上有两个不同的实数解x 1 ，x 2 ，则x 1 +x 2 = π 6 ． 其中正确命题的序号为 ______．
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皮皮学刷刷变学霸
举一反三
【单选题】The Metzler Paradox
A.
could theoretically happen when a small country levies a tariff.
B.
refers to a situation when an Optimal Tariff hurts a country's economic welfare.
C.
refers to a situation when the imposition of a tariff lowers domestic prices.
D.
refers to a situation when the imposition of a tariff helps foreign exporters.
E.
refers to a situation when export growth in a country harms its economic welfare.
【单选题】Stinking (发臭的) Buses Stinking buses jam(挤满) the crowded street. Drivers(51)at one another and honk(鸣喇叭)their horns. Smog(烟雾)hurts the eyes and chokes(窒息) the senses. The(52)is Athens at rush hour. The...
A.
cry
B.
shout
C.
curse
D.
attack
【单选题】Stinking (发臭的) Buses Stinking buses jam (挤满) the crowded street. Drivers(51)at one another and honk (鸣喇叭) their horns. Smog (烟雾) hurts the eyes and chokes (窒息) the senses. The(52)is Athens at rush hou...
A.
shout
B.
cry
C.
curse
D.
attack
【单选题】根据下列文章,请回答 51～65 题。 Stinking (发臭的) Buses Stinking buses jam (挤满) the crowded street. Drivers _________ (1) at one another and honk (鸣喇叭) their horns. Smog (烟雾) hurts the eyes and chokes (窒息) the sense...
A.
shout
B.
cry
C.
curse
D.
attack
【简答题】何谓市场营销计划？
【简答题】根据后面的英文解释，填写适当的英语
【简答题】Aloe Vitamin Hand Cream A rich yet lightweight non-greasy texture that acts like a glove providing protection against harmfulUV and external hurts. Its powerful anti-ageing element fights against the ...
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