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【单选题】
Letters are usually delivered by a postman whereas E-mails are sent through______.A.
the software
B.
the Internet
C.
a search engine
D.
a modem
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反馈参考答案：
举一反三
【简答题】光滑的水平桌面上放置一固定的圆环,半径为R。一质量为m的物体贴着圆环内侧运动(如图),物体与圆环间的滑动摩擦系数为 。设物体某一时刻在A点的速率为 ,求此后t时刻物体的速率以及从A点开始经过的路程。
【单选题】If your wages are very small, they'll be free ______ income tax.
A.
with
B.
about
C.
to
D.
of
【单选题】According to the last paragraph, we can conclude that ______.
A.
social interrelationship exerts influence on a culture tradition
B.
language reflects social and culture patterns
C.
language bears specific connotation under different cultures
D.
Americans expect different manifestations of being friendly to strangers TEXT D
【简答题】The last connotation of Li asks us to do things according to the principle of a( ).
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