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【单选题】
下列症状属于十字花科蔬菜菌核病的是A.
苗期心脉或沿脉失绿,后产生浓淡不均的绿色斑驳或。
B.
在高湿条件下病部表面条出白色棉絮状菌丝体和黑色菌核。
C.
初期病斑呈半透明、水渍状,后变褐色,组织粘滑腐烂。
D.
空气潮湿时,在叶背面布满白色至灰色稀疏霉层。
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举一反三
【单选题】In order to make our city green, _______________________.
A.
it is necessary to have planted more trees
B.
many more trees need to plant
C.
our city needs more trees
D.
we must plant more trees
【单选题】We are already represented by our sole agent in your city for the ()of our Enamelware.
A.
sell
B.
sale
C.
selling
D.
sales
【单选题】In order to make our city green,________.
A.
it is necessary to have planted more trees
B.
many more trees need to plant
C.
our city need more trees
D.
we must plant more trees
【单选题】To reduce the pressure of traffic in our city, the government _____ banning cars in the city centre.
A.
approaches
B.
advocates
C.
assists
D.
agrees
【简答题】In order to make our city
green, _______.A. it is necessary to have planted more trees B. many more trees need to plant C. our city needs more trees D. we must plant more trees
【简答题】简述同一律、矛盾律、排中律的基本内容。
【单选题】Our school was going to send a teacher to Xinjiang . I was the first person _______ to go.
A.
volunteer
B.
to volunteer
C.
volunteered
D.
volunteering
【单选题】_____by the beauty of our city, the Australian teacher decided to work in our school for another year.
A.
Attracting
B.
Attracted
C.
To be attracted
D.
Having attracted
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