单项选择题

The huge profit from patent rights forces many companies to develop new products on their own.

A. secretly
B. independently
C. jointly
D. readily
<上一题 目录 下一题>
热门 试题

单项选择题
The transition of the Earth’s magnetic field is possible caused by ______.
A. the flows of melted iron inside the Earth
B. the periodical movement of the Earth.
C. the mechanical energy of the solar system
D. the force coming from outer space.
单项选择题
A. put B. act C. sit D. give
A. put
B. act
C. sit
D. give
相关试题