更多"Weed killers must be chosen and app"的相关试题:
[单项选择]In order to be chosen, applicants must send in （）before Nov. 30, 2006.
A. their papers and application forms
B. their papers and degree certificates
C. their application forms and diplomas
D. their applications and registrations
[单项选择]Great efforts must be made if the war ___________ avoided.
A. will be
B. can be
C. has been
D. is to be
[单项选择]Great efforts to increase wheat production must be made if bread shortages ______ avoided.
A. will be
B. are to be
C. can be
D. were to be
[单项选择]To produce a mighty book, you must choose a great
A. matter
B. topic
C. theme
D. thesis
[单项选择]What is the significance of weed research according to Stepp
A. It would help to maintain the diversity of plants.
B. It would contribute to the growth of cultivated plants.
C. It would promote traditional medicines.
D. It will result in more modem health care facilities.
[单项选择]A knowledge of the composition of the weed community ______.
A. is essential to the efficient control of weeds
B. may lead us to be aware of the fact that the soil contains enormous quantities of seeds of numerous species
C. helps us to have a good idea of why seeds can lie dormant for years
D. provides us with the means to identify weeds at the seedling stage
[单项选择]Why were Sam and Joe chosen
A. The boss wanted them to get more experience.
B. The boss trusted them more than anyone else.
C. They were the last people who wanted to go.
D. They were the only men who offered to go.
[单项选择]The giant ragweed, or buffalo weed, grows ---.
A. 18 feet up to high
B. to high 18 feet up
C. up to 18 feet high
D. 18 feet high up to
