皮皮学，免费搜题
登录
搜题
【简答题】
SQL是关系数据库的结构化查询语言,它由 、 、 和 4部分组成。Select语句属于 ;Alter Table语句属于 ;Update语句属于 。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【简答题】If you’re traveling abroad, and you only have the money of your own country, then you should __________in order to purchase something more convenient in foreign countries.
查看完整题目与答案
【简答题】听辨练习20200217.doc 1 There is also a lot of difference between the East and the West in terms of management. 2 Tourism represents a kind of popular and pleasant activity that combines sightseeing, recre...
查看完整题目与答案
【单选题】根据下面材料，回答题。 The Need to RememberSome people say they have no memory at all: &qu
A.
根据下面材料，回答题。 The Need to Remember Some people say they have no memory at all: "I just can&39;t remember a thing!" But of course,we all have a memory. Our memory tells us who we are. Our memory helps us to make use in the present of what we have learnt in the past. In fact, we have different types of memory. For example, our visual memory helps us recall facts and places. Some people have such a strong visual memory, they can remember exactly what they have seen, for example, pages of a book, as a complete picture. Our verbal (言语的) memory helps us remember words and figures we may have heard butnot seen or written: items of a shopping list, a chemical formula, dates, or a recipe. With our emotional memory, we recall situations or places where we had strong feelings,perhaps of happiness or unhappiness. We also have special memories for smell, taste, touch and sound, and for performing physical movements. We have two ways of storing any of these memories: Our short-term memory stores items for up to thirty seconds- enough to remember a telephone number while we dial. Our long-term memory, on the other hand, may store items for a lifetime. Older people in fact have a much better long-term memory than short-term. They may forget what they have done only a few hours ago, but have the clearest remembrance (记忆) of when they were very young. Psychologists tell us that we only remember a few facts about our past, and that we invent the rest. It is as though we remember only the outline of a story. We then make up the details. We often do this in the way we want to remember them, usually so that we appear as the heroes of our own past-- or maybe victims needing sympathy (同情). Visual memory helps us recall a place we have been to. 查看材料 A.Right
B.
Wrong
C.
Not mentioned
查看完整题目与答案
【简答题】If you aren't curious about other cultures, then you probably haven't had the chance to experience them. The ______ and the exciting thing about intercultural communication is that everyone is operati...
查看完整题目与答案
【多选题】Defects in the genes encoding the proteins involved in ______________________________________________________ have all been linked to human cancers.
A.
nucleotide-excision repair
B.
mismatch repair
C.
recombinational repair
D.
error-prone translesion DNA synthesis
查看完整题目与答案
【单选题】All of the amino acids that are used to synthesize human proteins (with the exception of glycine) have which one of the following in common?
A.
An aromatic group
B.
A hydroxyl group
C.
An asymmetric carbon in the D-configuration
D.
An asymmetric carbon in the L-configuration
E.
An asymmetric β -carbon
查看完整题目与答案
【简答题】If traveling abroad, ________________ prior to the trip to find out if any immunizations are recommended or required.
查看完整题目与答案
【单选题】If a chance of traveling abroad ___ John’s way, he would be delighted.
A.
made
B.
went out of
C.
was on
D.
came
查看完整题目与答案
【判断题】边际储蓄倾向越小，投资乘数将越小
A.
正确
B.
错误
查看完整题目与答案
【单选题】Traveling abroad will cost much, but _____ it can improve your understanding to the world. A. however B. on one hand C. even if D. on the other hand
A.
however
B.
on one hand
C.
even if
D.
on the other hand
查看完整题目与答案
相关题目：
【简答题】If you’re traveling abroad, and you only have the money of your own country, then you should __________in order to purchase something more convenient in foreign countries.
查看完整题目与答案
【简答题】听辨练习20200217.doc 1 There is also a lot of difference between the East and the West in terms of management. 2 Tourism represents a kind of popular and pleasant activity that combines sightseeing, recre...
查看完整题目与答案
【单选题】根据下面材料，回答题。 The Need to RememberSome people say they have no memory at all: &qu
A.
根据下面材料，回答题。 The Need to Remember Some people say they have no memory at all: "I just can&39;t remember a thing!" But of course,we all have a memory. Our memory tells us who we are. Our memory helps us to make use in the present of what we have learnt in the past. In fact, we have different types of memory. For example, our visual memory helps us recall facts and places. Some people have such a strong visual memory, they can remember exactly what they have seen, for example, pages of a book, as a complete picture. Our verbal (言语的) memory helps us remember words and figures we may have heard butnot seen or written: items of a shopping list, a chemical formula, dates, or a recipe. With our emotional memory, we recall situations or places where we had strong feelings,perhaps of happiness or unhappiness. We also have special memories for smell, taste, touch and sound, and for performing physical movements. We have two ways of storing any of these memories: Our short-term memory stores items for up to thirty seconds- enough to remember a telephone number while we dial. Our long-term memory, on the other hand, may store items for a lifetime. Older people in fact have a much better long-term memory than short-term. They may forget what they have done only a few hours ago, but have the clearest remembrance (记忆) of when they were very young. Psychologists tell us that we only remember a few facts about our past, and that we invent the rest. It is as though we remember only the outline of a story. We then make up the details. We often do this in the way we want to remember them, usually so that we appear as the heroes of our own past-- or maybe victims needing sympathy (同情). Visual memory helps us recall a place we have been to. 查看材料 A.Right
B.
Wrong
C.
Not mentioned
查看完整题目与答案
【简答题】If you aren't curious about other cultures, then you probably haven't had the chance to experience them. The ______ and the exciting thing about intercultural communication is that everyone is operati...
查看完整题目与答案
【多选题】Defects in the genes encoding the proteins involved in ______________________________________________________ have all been linked to human cancers.
A.
nucleotide-excision repair
B.
mismatch repair
C.
recombinational repair
D.
error-prone translesion DNA synthesis
查看完整题目与答案
【单选题】All of the amino acids that are used to synthesize human proteins (with the exception of glycine) have which one of the following in common?
A.
An aromatic group
B.
A hydroxyl group
C.
An asymmetric carbon in the D-configuration
D.
An asymmetric carbon in the L-configuration
E.
An asymmetric β -carbon
查看完整题目与答案
【简答题】If traveling abroad, ________________ prior to the trip to find out if any immunizations are recommended or required.
查看完整题目与答案
【单选题】If a chance of traveling abroad ___ John’s way, he would be delighted.
A.
made
B.
went out of
C.
was on
D.
came
查看完整题目与答案
【判断题】边际储蓄倾向越小，投资乘数将越小
A.
正确
B.
错误
查看完整题目与答案
【单选题】Traveling abroad will cost much, but _____ it can improve your understanding to the world. A. however B. on one hand C. even if D. on the other hand
A.
however
B.
on one hand
C.
even if
D.
on the other hand
查看完整题目与答案