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【单选题】
PCl 5 的分解反应 PCl 5 ( g )= PCl 3 ( g ) +Cl 2 ( g ) ,在一定温度下达到平衡 后 , 在该密闭容器中加入 N 2 ,该反应A.
平衡右移
B.
平衡左移
C.
平衡常数不变
D.
平衡常数减小
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【单选题】关于儿童股骨头骨骺骨缺血坏死的Ⅹ线征象下列哪一项是错误的
A.
股骨头骨骺较小且扁
B.
股骨头骨骺密度增高
C.
股骨头骨骺增生
D.
早期出现明显关节间隙狭窄
E.
治疗准确及时者，死骨吸收消失，新骨出现，股骨头骨骺大小。密度及结构回复正常
【单选题】What statement is NOT the author's answer to the question “How Do We Acquire Language”?
A.
We acquire our native language in a natural way.
B.
We are preprogrammed to process and produce our first language.
C.
Children don't always follow the exact stages presented in the studies of L1 acquisition.
D.
Infant babies are not able to pick out their native language from other sounds untile they are 10-month-old.
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