题目内容
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[主观题]
When some flowering plants have the male and female reproductive organs in separate flowers on the same plant, they are _________.
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发布时间：2022-01-07
题目内容
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第2题
A tree that has needle-shaped leaves which it does not normally lose in winter, and produces brown cones that contain its seeds is __________.
第3题
When some plants have the male and female reproductive organs in separate flowers on separate plants, they are __________.
第4题
Explore the campus and choose one part of a certain tree which you think is particular enough for identifying tree species. Then use the observation method introduced in this unit to collect data and make a description of the specific part by using the collected information. Read your description to your friends and let them guess what tree it is.
第5题
Pinus pinaster which was subsequently tapped for resin, as well as used for timber.
A、strike
B、knock
C、cut
D、throw
第6题
Modern uses of resins are in the manufacture of paint, varnish, and lacquers, as size in paper making to provide lustre and weight and to hinder the absorption of ink and moisture, and in making soap.
A、glue
B、magnitude
C、measurement
D、state
第7题
When stands are grown mainly for greenery or Christmas trees, care must obviously be taken to discourage defoliating insects, and the removal of foliage represents a considerable export of nutrients from the site, with little recycling of litter.
A、waste
B、weeds
C、rubbish
D、defoliation
第8题
Varieties have been bred which show both improved timber production and a prolongation of the flowering period to increase nectar yields for bee-keepers.
A、resistance
B、development
C、supplement
D、production
第9题
Varieties have been bred which show both improved timber production and a prolongation of the flowering period to increase nectar yields for bee-keepers.
A、select
B、keep
C、transplant
D、fertilize
