单项选择题

With the technology application of growing __________ in container,
design, manufacture and selection of the container is becoming more
and more important.
A、couple planting
B、landscape plant
C、landscape plant
D、ornamental plant

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单项选择题

为保证教学目标表述清晰,我们应该选择下面动词。 A.
了解 B.
掌握 C.
体会 D.
说出

焊接用 CO2气体和 Ar 气一样,瓶中装得都是气态。( )
正确
错误

答案：错误