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某屠宰场屠宰一批生猪后,经检疫人员检疫,肉眼发现某屠宰猪肉膈肌中有针尖大小的白色小点。取麦粒大小的肌肉,经压片后,低倍镜检查见梭形包囊,包囊内有卷曲的虫体。该虫体最可能是
A、猪囊尾蚴
B、细颈囊尾蚴
C、旋毛虫
D、肉孢子虫

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单项选择题关于地下洞室松散围岩,下面说法错误的是()? Regarding the loose surrounding rock in underground caves, what is wrong in the following statement

A.松散围岩是指具有整体结构的围岩 Loose surrounding rock refers to surrounding rock with integral structure
B.松散围岩的变形与破坏主要是在应力重分布和地下水作用下发生 The deformation and failure of loose surrounding rocks mainly occur under stress redistribution and groundwater
C.主要类型有重力坍塌和塑流涌出 The main types are gravity collapse and plastic flow
D.断层破碎带、风化破碎带均是松散岩体 Both the fault fracture zone and the weathered fracture zone are loose rocks

单项选择题对于数据集df,语句df.loc[1:2,'语文']执行后的结果是 A、 B、 C、 D、