The policemen _____ the suspects’ faces closely, trying to work out who was lying.
A. scrutinized
B. perceived
C. launched
D. excluded
查看答案
The job requires a lot of enthusiasm, dedication and _____. Think it twice before you decide to apply for it.
A. self-evidence
B. self-harm
C. self-sacrifice
D. self-consciousness
1.食用菌一般由( )两部分组成
A. 丝体
B. 子实体
C. 孢子
D. 多糖
松茸具有独特的浓郁香味,香味成分主要为( )
A. 菇醇(1-辛烯-3-醇)
B. 多糖
C. 核苷酸
D. 三萜
食用菌是森林生态系统的分解者,可以直接利用和降解森林中的有机残体(木质素、半木质素和纤维素),参与有机物的分解和养分的循环,在森林生态系统物质和能量流动中起着重要作用。
A. 对
B. 错