饮水中氯化副产物主要有()。
A.氯化汞
B.氯化钙
C.次氯酸
D.氯仿
E.氯化镁
参考答案:C
解析:饮水中氯化副产物主要是次氯酸。
________ is know to us all is that the old worker, for _______ life was hard in the past, still works hard in his seventies.
A.As; whom
B.What; whose
C.It; whose
D.What; whom
男,5岁,于夏季突发高热,2小时后抽搐,面色灰暗,四肢凉,血压下降,心肺未见异常,脑膜刺激征阴性
最有可能的诊断()
A.颅内诊断
B.结核性脑膜炎
C.颅内肿瘤
D.中毒性细菌性痢疾
E.化脓性脑膜炎