翡翠(处理)是指:().A.用强酸碱处理后加高分子胶,加入颜色 B.只要用强酸碱处理

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问题:

翡翠(处理)是指:().

A.用强酸碱处理后加高分子胶,加入颜色

B.只要用强酸碱处理过

C.加热后加色

D.洗过的

E.在裂隙中有充填胶或色料

考点:珠宝鉴定师珠宝鉴定师题库
题型:多项选择题

Chocolate is good for your heart, skin and brain. Usually, people think that chocolate is bad for their health. They describe chocolate as “something to die for” or say “death by chocolate”.Now they should bite their tongues! Evidence(证据) is showing that some kinds of chocolate are actually good for you in the following ways:

A happier heart

Scientists at Harvard University recently examined 136 studies on cocoa—the main ingredient in chocolate and found that it does seem to strengthen the heart.Studies have shown heart benefits from increased blood flow.These benefits are the result of cocoa’s chemicals, which seem to prevent both cell damage and inflammation(炎症).

Better blood pressure

If yours is high, chocolate may help.Jeffrey Blumberg from Tufts University recently found that people with high blood pressure who ate 3.5 ounces of dark chocolate per day for two weeks saw their blood pressure drop quickly.

Muscle magic

Chocolate milk may help you recover after a hard workout(锻炼).In a small study at Indiana University, people who drank chocolate milk between workouts did better on a tiredness test than those who had some sports drinks

Better for your skin.German researchers gave 24 women a half-cup of special cocoa every day.After three months, the women’s skin was moister(滑润的)and smoother.The research shows that chocolate helps protect and increase blood flow to the skin, improving its appearance.

Brain gains

It sounds almost too good to be true, but research suggests that chocolate may improve your memory, attention span, reaction time, and problem-solving by increasing blood flow to the brain.

小题1:Which of the following is wrong?                                            

A.Coca’s chemicals can prevent both cell damage and inflammation.

B.Chocolate may help you lower your blood pressure.

C.People early know chocolate is good for their health.

D.chocolate may improve your memory, attention span, reaction time, and problem-solving.小题2:What’s the meaning of the underlined sentence in the fourth paragraph?

A.Sports drinks are better than chocolate milk.

B.Sports drinks can make people easy to be tired.

C.Drinking milk can keep you energetic at work.

D.We should drink chocolate milk between times when we work hard.小题3:What’s the main idea of the text?

A.Chocolate, a Healthy Food

B.More Chocolate, Less Health

C.Chocolate and Blood Pressure

D.Advice on Eating Chocolate小题4:The conclusion that chocolate may help lower blood pressure was brought out by       

A.scientists at Harvard University

B.Jeffrey Blumberg from Tufts University

C.scientists at Indiana University

D.German researchers小题5:What’s the meaning of “bite their tongues” in the first paragraph?

A.Think of it..

B.Speak up.

C. Stop talking

D.Listen to it

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适于邮寄的物品和文字载体,只要符合信函规定的重量、尺寸限度和封装规格,应按信函交寄。

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以太网策略中有3种监听方法,其中一种是,一旦“介质空闲就发送数据,假如介质忙,继续监听,直到介质空闲后立即发送数据”,这种算法称为 (31) 监听算法。这种算法的主要特点是 (32) 。 CSMA/CD协议具有:中突检测功能,网络中的站点一旦检测到>中突,就立即停止发送,并发阻塞码,其他站点都会 (33) 。如果基带总线的段长为d=1000m,中间没有中继器,数据速率为R=10Mbit/s,信号传播速率为V=200m/μs,为了保证在发送期间能够检测到冲突,则该网络上的最小帧长为 (34) bit。对于具有同样参数的宽带总线网络,最小帧长应为 (35) bit。

A.50

B.100

C.150

D.200

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人员进入施工场所必须先观察顶板及周围环境,发现问题及时处理。

题型:多项选择题

拆除施工应分段进行,不得()作业。

A.机械

B.人工

C.垂直交叉

D.多工种

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