110kV及以上钢筋混凝土构件支座上电气设备的金属外壳,可利用金属构架作接地线。
参考答案:错
He ______ to the party this evening if he has to look after his younger sister. [ ]
A. needn't to come
B. doesn't need to come
C. doesn't need come
D. needs not come
以下哪种疾病不属于自身免疫性疾病()。
A.系统性红斑狼疮
B.幼年性特发性关节炎
C.地中海贫血
D.过敏性紫癜
E.川崎病