预防*邮件炸弹*的侵袭，最好的办法是（）。_网络信息安全试题_全学科试题题库

当前学科：网络信息安全试题

题目：单选
预防*邮件炸弹*的侵袭，最好的办法是（）。
答案： <查看本题扣1积分>

查看答案

答案不对？请尝试站内搜索

推荐知识点:

碱液除锈是化学性的溶解作用的结果。

对于催乳激素描述恰当的是（）

城市出租汽车拥有量根据实际情况确定，大城市每千人不宜少于（）辆；小城市每千人不宜少于（）辆；中等城市可在其间取值。

下列不是慢性胃溃疡恶变的征象的是（）。

（）腻子在汽车维修中应用最广泛。

回答题: Exercise Being Good or BadCan exercise be a bad thing? Sudden death during or soon after strenuous exertion on the squash court or on the army training grounds, is not unheard of. 51 trained marathon runners are not immune to fatal heart attacks. But no one knows just 52 common these sudden deaths linked to exercise are. The registration andinvestigation of such 53 is very patchy; only a national survey could determine the true 54 of sudden deaths in sports. But the climate of medical opinion is shifting in 55 of exercise, for the person recovering from a heart attack as 56 as the average lazy individual. Training can help the victim of a heart attack bylowering the 57 of oxygen the heart needs at any given level of work 58 the patient can do more before reaching the point where chest pains indicate a heart starved of oxygen. The question is, should middle-aged people, 59 .particular, be screened for signs of heart disease before 60 vigorous exercise?Most cases of sudden death in sport are caused by lethal arrhythmias in the beating of the heart, often in people 61 undiagnosed coronary heart disease. In North America 62 over 35 is advised to have a physical check-up and even an exercise electrocardiogram. The British, on the whole, think all this testing isunnecessary. Not many people die from exercise, 63 , and ECGs ( 心电图 ) are notoriously inaccurate. However, two medical cardiologists at the Victoria Infirmary in Glasgow, advocate screening by exercise ECG for people over 40, or younger people 64 at risk of developing coronary heart disease. Individuals showing a particular abnormality in their ECGs 65 , they say, a 10 to 20 times greater risk of subsequently developing signs of coronary heart disease, or of sudden death.第51题应选：

国有企业实行两权分离的经营方式及种类有哪些？

12号字体比10号字体（）

列举各类果实的结构特征。

称脾为"气血生化之源"的理论基础是（）