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【单选题】
Be careful when you surf the Internet．If you download a virus into your computer ______, you will not open your files．A.
on purpose
B.
by accident
C.
at random
D.
on average
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】The driver was very happy that his car ______ very well in this car-washing centre.
A.
cleans
B.
cleaned
C.
was cleaned
D.
is cleaned
【单选题】The policeman warned the driver _______too fast. It was very dangerous.
A.
to drive
B.
not to drive
C.
driving
D.
not driving
【判断题】The driver repeated that he should have kept in touch because he was very regretful.
A.
正确
B.
错误
【简答题】已知某一时期内某商品的需求函数为Q d =50-5P,供给函数为Q s =-10+5P。 ( 1 )求均衡价格P e ,和均衡数量Q e ,并作出几何图形 (2)假定供给函数不变,由于消费者的收入水平提高,需求函数变为Q d =60-5P求出相应的均衡价格 P e ,和均衡数量 Q e ,并作出几何图形。 (3)假定需求函数不变,由于生产技术水平提高,供给函数变为Q s =-5+5P。求出相应的均...
【简答题】work we eat lunch the can.
【简答题】The driver was very __________ (thank) to the policeman for his help.
【单选题】Mr. Simpson stopped at the pedestrian crossing because
A.
the lighting was very good along the stretch.
B.
he was riding with two ladies at the moment.
C.
he wanted to ensure the safety of two passers-by.
D.
he was a new driver who tends to be cautious.
【单选题】Since there was very heavy traffic on the main road, the driver took a ____street.
A.
wide
B.
single
C.
side
D.
near
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