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七选五 Holiday gift buying can feel a little empty , when all of those endless lists , long lines at the shopping center and dollars spent lead to a 5­minute excitement of flying wrapping paper.__ 1 __The following tips can help make gift giving more meaningful for both the giver and the receiver. 1 . Know the person The most important thing in the exchanging of gifts is that it shows you really know the person well , and you really care about him.__ 2 __ 2 . Donate in their name __ 3 __Research suggests that happier people give more to others, and that giving more makes people happier.Moreover , charity­related happiness is highest when people give in a way that promotes social connection.So , try giving to the less fortunate in someone’s name this holiday season. 3 . Give handmade goods or hand­me­downs __ 4 __A study suggests that people feel that homemade items show more love , and love is what they want to express to the gift receiver. Family heirlooms ( 传家宝 ) may be another good gift option.A 2009 study found that when families hand down even a very depersonalized thing—money—to the generations , the symbolic value of the cash is greater than the numerical value alone. 4 . Provide chances for participation If there’s a golden rule of gifts , though , it’s this : __ 5 __People who receive experiential gifts , such as concert tickets or a zoo membership , feel more connected to the gift giver than people who received material gifts. A . But it doesn’t have to be that way. B . Give experiences rather than objects. C . The new and store­bought is not always best. D . That is always beyond their expectation. E . That means catering to another’s pleasure. F . Giving gifts to friends or to charity is linked to happiness. G . Start listing every person you plan to give a holiday gift.
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【多选题】三相异步电动机的制动有:
A.
能耗制动
B.
反接制动
C.
发电反馈制动
D.
机械制动
【简答题】三相异步电动机有直接启动和 两种启动方式,三相异步电动机的停止制动方式有 和机械制动两种。
【多选题】三相异步电动机的制动有下列几种方法:
A.
能耗制动
B.
反接制动
C.
发电反馈制动
【单选题】Internet连向全球,是连接全球信息的重要网络,但它的骨干网是由( )主持的。
A.
英国
B.
美国
C.
日本
D.
中国台湾
【单选题】因为呈乳浊液的基础汤汁具有不稳定的性质,因此容易形成( )。
A.
蛋白质变性
B.
脂肪酸败
C.
蛋白质水解
D.
水油分离
【简答题】根据支路电流法, 对于 具有M条支路,N个节点的电路,只能列写出 个独立的KVL方程。
【多选题】三相异步电动机的制动方式有( )
A.
直流制动
B.
回馈制动
C.
反接制动
D.
降压制动
【简答题】元器件插装到印制电路板上,应按工艺指导卡进行,元器件的插装总原则为: 、 、 、 ,先插装的元器件不能妨碍后插装的元器件。
【单选题】根据支路电流法,对于具有M条支路,N个节点的电路,只能列写出 个独立的KVL方程。
A.
M-N
B.
M+ N
C.
M-N+1
D.
M+N-1
【判断题】活性染料的固色率越低,白地沾污现象就会越严重。
A.
正确
B.
错误
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