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Breakfast is the most important meal of the day. It is also the most neglect (忽视). Common reasons for not eating breakfast include having no time, not feeling hungry, traditional dislike and dieting. Breakfast simply means “break the fast’’. Your body spends at least 6 to 12 hours each night in a fasting state. In the morning your body needs energy for the day’s work ahead. A good breakfast should provide 1/3 of your total calorie(卡路里)needs for the day. On average, we eat 400 less calories for breakfast than for dinner. If breakfast doesn’t appeal (吸引) to you in the morning, try eating a lighter dinner earlier in the evening or save half of your dinner for breakfast in the morning. If you still aren’t hungry in the morning, start with something small like juice or toast or have a nutritious (有营养的) mid-morning snack (小吃) later when you are hungry. So, you say you are on a diet. Some people fear that eating breakfast will make them hungrier during the day and they will eat more. It is true that eating breakfast is likely to make you feel hungry throughout the day. That is because your body is working correctly. Although you may feel as if you are eating more all day long, in reality you are probably not. Not eating breakfast can also cause you t overeat, since a fall in blood sugar often makes you feel very hungry later. To make matters worse, since your body is in a slow state, it will not be able to burn those extra calories very efficiently (有效). If you feed your body healthy snacks and meals throughout the day, you are less likely to become hungry and stuff (填饱) yourself as soon as you begin to eat. Since breakfast is the first and most important meal of the day, choosing the right food is important. The best breakfast foods are fruits ,juice, lean meat and grain products such as bread, rice, noodles and cereals. 小题1:. What is the meaning of the word “fast” in the phrase“break the fast”? A.movement B.going without food C.quickness D.certain kind of food 小题2:. If you don’t want to have breakfast in the morning, according to the writer’s suggestion, you should________. A.see a doctor to have an examination B.have a little supper C.go to a restaurant to enjoy a good meal D.have a good supper 小题3:. Eating breakfast, in fact, makes your body_________. A.work out of order B.produce too much energy C.work well D.feel hungry quicker 小题4: Not eating breakfast will_________. A.save a lot of money B.do harm to your health C.do good to your health D.help you keep in shape 小题5: In the last paragraph the writer mainly_________. A. persuades us to have a good breakfast B. tell us what food isn’t suitable for breakfast C describes when and how we should have our breakfast D .tell us what food we should have for breakfast
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【单选题】世界卫生组织总干事谭德塞高度评价中国采取有力措施对新型冠状病毒感染肺炎疫情进行科学有效防控,展现了勇气和担当。下列属于谭德赛评价内容的是() 谭德塞表示,中国以前所未有的速度甄别出病原体并第一时间同世界卫生组织和其他国家分享有关病毒基因序列,第一时间共享数据,为研制出病毒快速检测工具提供了可能,展示中国对世界的担当与责任。
A.
以前所未有的速度确定疫情,第一时间采取了最有效的防控措施。
B.
第一时间确定新型冠状病毒是人传人的病毒,并立即公之于众。
C.
在发现病毒的第一时间对武汉进行封城,及时阻断了疫情的传播。
D.
以前所未有的速度甄别出病原体并第一时间同世界卫生组织和其他国家分享有关病毒基因序列。
【简答题】已知二次型f(x,y,z)=a 11 x 2 +a 22 y 2 +a 33 z 2 +2a 12xy +2a 13xz +2a 23yz 是正定的.试证:椭球体f(x,y,z)≤1的体积为 ,其中A为二次型f的矩阵.
【判断题】没有底物的存在,反竞争性抑制剂并不能与酶结合
A.
正确
B.
错误
【单选题】男 .45岁,农民,急起发热、头痛、全身乏力5天。体查:T38℃,P122 次/分,BP70/60mmHg,脸面及颈部潮红,眼结膜充血,球结膜可见片状出血,注射部位及双臀部可见大片瘀斑,肺部未闻及异常。 首要的检查是
A.
血 、尿常规检查
B.
血培养
C.
骨髓培养
D.
免疫功能检测
E.
出、凝血时间测定
【单选题】下列国家属于中立型国防的是( )。
A.
美国
B.
中国
C.
俄罗斯
D.
瑞典
【单选题】2013年,某事业单位以货币资金购入国库券5000股,每股价值10元,发生税金1000元,手续费500元,购买时发生的印花税为500元,该国库券的入账价值是( )?
A.
50000
B.
51000
C.
51500
D.
52000
【判断题】没有底物的存在,反竞争性抑制剂并不能与酶结合。
A.
正确
B.
错误
【简答题】已知实二次型f(x1,x2,x3)=a(x11+x22+x32)+4x1x2+4x1x3+4x2x3经正交变换x=Py可化成标准形f=6y12,则a=_______.
【简答题】用指示剂确定终点时,弱酸能被强碱准确滴定的条件为_________。当酸太弱时,通过______和两种方法仍可用强碱准确滴定。
【单选题】设n元二次型f(x1,x2,…,xn)=XTAX,其中AT=A.如果该二次型通过可逆线性变换X=CY可化为f(y1,y2,…,yn)=YTBY,则以下结论不正确的是 ( ). A.A与B合同
B.
A与B等价
C.
A与B相似
D.
r(A)=r(B)
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