实验测得人体内一些液体pH如下，其中酸性最强的是（ ）A．唾液6.6~7.1 B．胃液0.9~1.5C．汗液6.6~7.6 D．血浆7.35~7.45
美国总统奥巴马在组阁时不但提名党内预选时的“劲敌”希拉里为国务卿，还邀请共和党的国防部长盖茨留任。昔日竞选时恶语相向“打”得热火朝天
在Rt△ABC中，∠C＝90°，a=5，c=13，则△ABC的面积为 ．
I know I should have told the headmaster at the time. That was my real 1 . He had gone out of the study for some 2 , leaving me alone. In his absence. I looked to see 3 was on his desk. In
现代文阅读。阅读下文，完成1—5题。 千万别折腾汉字 姚安隆 ①这两年，总有人拿汉字说事。一会儿说繁体字要进课堂，一会儿又说用十年时间，放弃
She looks pretty ______ she wears. A. in B. whatever C. what D. which
上的奇函数
，若满足
，则
的值为