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【单选题】
根据植物组培的涵义,以下技术操作或过程属于植物组织培养的是( )。A.
将葡萄种子播种在中土壤中
B.
从植株上将葡萄藤剪成带芽的扦插在温室的苗床上
C.
将葡萄优良品种美人指的芽段作为接穗，嫁接到其他品种的葡萄植物上
D.
将葡萄幼嫩的茎段通过无菌接种技术移植在灭菌的培养基中并放置在一定温度及光照的培养室中进行培养
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【简答题】A．To stress the role of dirt. B．To introduce the history of dirt. C．To call attention to the er of dirt. D．To present the change of views on dirt.
【单选题】ground-in dirt
A.
dirt which is ground in the fingernails
B.
dirt which is grounded in the fingernails
C.
dirt which is grinded in the fingernails
【简答题】Getting rid of dirt, in the opinion of most people, is a good thing. However, the attitudes to dirt are always changing. In the early 16th century, people thought that dirt on the skin was a means to ...
【单选题】Dirt should not be allowed to contaminate a grease lubricant because the _____.
A.
dirt will cause corrosion of bearing
B.
bearings will leak oil excessively
C.
dirt is very abrasive when mixed with grease
D.
grease will become inflammable
【单选题】If a place is dirt poor, it is ______.
A.
not poor at all
B.
extremely poor
C.
poor like dirt
D.
not so poor
【单选题】Directions：There are 10 blanks in the following passage. For each blank there are four choices marked A), B), C) and D). You should choose the ONE that best fits into the passage.Remember back to when...
A.
volume
B.
bulk
C.
proportion
D.
amount
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