Four years ago, Jane was twice as old as Sam. Four years on from now, Sam will be 3/4 of Jane's age. How old is Jane now?

[单选题]气体灭火系统防护区内应设有疏散通道和安全出口，并设置应急照明和疏散指示标志，且能保证防护区内人员在（）秒内安全撤离防护区。

[单选题]患者，女，34岁，因急性肠炎入院治疗，三餐饮食种类如下，其中不适宜的是（）

[多选题]《中华民国临时政府组织大纲》的编撰起草人有（）

[单选题]在MIMO模式，哪个因素对数据流量影响最大（）

[单选题]以下关于阑尾叙述不正确的是（）。

[多选题]对公优惠利率申请，以下哪些适合事后审批功能（即存入后审批）（）。

[名词解释题]社会保障

[问答题]应用有关药物不良反应的研究结果于具体临床工作时，我们主要从哪几个方面考虑？

[单选题]幻觉是指（）

[多选题]下列工程中，项目负责人必须由本建筑工程专业一级注册建造师担任的有()。

[问答题]Four years ago, Jane was twice as old as Sam. Four years on from now, Sam will b...

[问答题]Four years ago, Jane was twice as old as Sam. Four years on from now, Sam will b...

[问答题]Four years ago, Jane was twice as old as Sam. Four years on from now, Sam will b...

[单选题]I wonder how many years ago _____.

[单选题]I wonder how many years ago _____.

[单选题]Eight hundred years ago an Englishman _____.

[单选题]A few hundred years ago news did not _____.

[单选题]Eight hundred years ago an Englishman _____.

[单选题]A few hundred years ago news did not _____.

[问答题]When David is twice as old as he is now he will be four times as old as his daug...