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【单选题】
According to the first two paragraphs, foods have been genetically altered to ______.
A.
taste more delicious
B.
cure people's ineffectiveness in immune system
C.
promote sales of peanut
D.
lower the chance to get allergy
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【判断题】全面清查由于清查范围大、内容多、时间长、参与人员多,宜经常进行 ( ) 。 
A.
正确
B.
错误
【单选题】( )'Every boy and every girl_____here 、Let ’s have the me eting.
A.
is
B.
are
C.
was
D.
were
【简答题】设函数f(x)=x-ln(x+m),其中m为实常数. (Ⅰ)当m为何值时,f(x)≥0; (Ⅱ)证明:当m>1时,函数f(x)在[e -m -m,e 2m -m]内有两个零点.
【简答题】已知函数f(x)=x 2 -(a+2)x+alnx,其中常数a>0. (1)当a>2时,求函数f(x)的单调递增区间; (2)当a=4时,若函数y=f(x)-m有三个不同的零点,求m的取值范围; (3)设定义在D上的函数y=h(x)在点p(x 0 ,h(x 0 ))处的切线方程为l:y=g(x),当x≠x 0 时,若 h(x)-g(x) x- x 0 >0 在D内恒成立,则称P为函数y=h(x)的...
【简答题】(本小题共14分)已知函数 其中常数 . (1)当 时,求函数 的单调递增区间; (2)当 时,若函数 有三个不同的零点,求m的取值范围; (3)设定义在D上的函数 在点 处的切线方程为 当 时,若 在D内恒成立,则称P为函数 的“类对称点”,请你探究当 时,函数 是否存在“类对称点”,若存在,请最少求出一个“类对称点”的横坐标;若不存在,说明理由.
【单选题】—My sister goes swimming every Sunday. —Oh? But she __________hate swimming.A. used
A.
10. —My sister goes swimming every Sunday. —Oh? But she __________hate swimming. A. used to
B.
use to
C.
uses to
D.
is used to
【单选题】Every spring migrating salmon return to British Columbia's rivers to spawn. And every spring new reports detail fresh disasters that befall them. This year is no different The fisheries committee of C...
A.
salmon's return to spawn and its survival
B.
the fisheries committee of Canada's House of Commons and Bryan Williams
C.
the struggle between sockeye salmon and human beings
D.
the collision between salmon's Survival and human fishery
【单选题】Computers are so popular in our country that every pupil knows________ e-mails.A. h
A.
10. Computers are so popular in our country that every pupil knows________ e-mails. A. how can he send
B.
how does he send
C.
how to send
D.
how sending
【简答题】Every time...
【单选题】Bob goes to the Children's Palace every day _____ Sunday. Every Sunday he helps at the Old People's Home. [     ]
A.
on
B.
in
C.
during
D.
except
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