is sally cleaning her house?
题目
is sally cleaning her house?
a.yes,she isn't b.no,she is c,yes,he is d.no,she isn't
2.there are many people here.they __ a dragon dance.
a.learn b.learning c,are learning d.learns..
3.may i speak to mary,please?____
a.i'm mary b.who are you? c.this is mary speaking. d.what happened?
4.i am getting ready ___ a birthday cake for lingling
a.for make b.to make c.making d.make
5.is your father ___ work or ___ home?
a.at;at b,at;on c.at to d.in at
6.here are new clothes,give ____,please.
a.me it b,them him c.them to him d,it me
7.yesterday a traffic accident happened__ the boy in the street.
a.about b.to c.at d.on
8.can you help me make lanterns?
a.yes,i am b,no,i can. c.yes,i do d.sorry,i ca
答案
D
C
C
B
A
C
B
D
D
B
C
A
B
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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