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【单选题】
贮藏蔬菜，水果要保持低温，这是因为 [     ]
A.
温度低，减少细菌病害
B.
温度低，植物不进行呼吸作用
C.
温度低，呼吸作用弱，有机物消耗少
D.
温度低，有利有机物的积累
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参考答案：
举一反三
【简答题】我国采用国家标准或先进标准的方式通常有 、 、和 。
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【单选题】通常，我国在国家标准管理办法中规定国家标准实施(11)内要进行复审。
A.
3年
B.
5年
C.
8年
D.
10年
查看完整题目与答案
【单选题】在下图中,与查询设计器的筛选标签中所设置的筛选功能相同的表达式是( )。
A.
选修表.成绩>=80 AND 选修表.成绩=<90
B.
选修表.成绩>80 AND 选修表.成绩<90
C.
80<=选修表.成绩 <=90
D.
80
查看完整题目与答案
【单选题】图示有源二端电阻网络 A 外接电阻 R 为 12 W 时, I = 2 A ; R 短路时, I = 5 A 。 则当 R 为 24 W 时 I 为( )。
A.
4A
B.
2.5A
C.
1.25A
D.
1A
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【单选题】铁路运输的一批零担货物的件数不得超过（）
A.
200件
B.
300件
C.
400件
D.
500件
查看完整题目与答案
【简答题】观察与探究： 某礼堂共有25排座位，第一排有20个座位，后面每一排比前一排多1个座位，写出第25排的座位数．在以上其他条件不变的情况下，请探究下列问题 （1）当后面每一排都比前一排多2个座位时，写出第n排的座位数； （2）当后面每一排都比前一排多3个座位时，4个座位时，分别写出第n排的座位数； （3）某剧院共有P排座位，第一排有a个座位，后面每一排多b个座位，试写出第n排的座位数．
查看完整题目与答案
【判断题】“孙儿”写成拼音时,要加隔音符号。
A.
正确
B.
错误
查看完整题目与答案
【单选题】铁路运输,一批零担货物的件数不得超过( )。
A.
200件
B.
300件
C.
400件
D.
500件
查看完整题目与答案
【单选题】听力：What does the man say about Chinese?
A.
Q: What does the man say about Chinese? W: Hi, Leo. Why do you say English will become the world language? M: Well, for one thing, it's so commonly used. The only language that is used by more people is Chinese. W: Why is English spoken by so many people? M: It's spoken in many countries of the world because of the British Empire. And now, of course, there's influence of America as well. W: Many students find English a difficult language to learn. M: Oh, all languages are difficult to learn. But English does have two great advantages. W: What are they? M: Well, first of all, it has a very international vocabulary. It has many German, Dutch, French, Spanish and Italian words in it. So speakers of those languages will find many familiar words in English. In fact, English has words from many other languages as well. W: Why is that? M: Well, partly because English speakers have travelled a lot. They bring back words with them, so English really does have an international vocabulary. W: And what's the other advantage of English? M: It's that English grammar is really quite easy. For example, it doesn't have dozens of different endings for its nouns, adjectives and verbs, not like Latin, Russian, and German for example. W: Why is that? M: Well, it's quite interesting actually. It's because of the French. When the French ruled England, French was the official language and only the common people spoke English. They try to make the language as simple as possible, so they made the grammar easier. A.It is more difficult to learn than English.
B.
It is used by more people than English.
C.
It will be as commonly used as English.
D.
It will eventually become a world language.
查看完整题目与答案
【单选题】某礼堂共有25排座位,后一排比前一排多两个座位,最后一排有70个座位,问礼堂共有( )个座位第十七课时
A.
1152
B.
1150
C.
2300
D.
2302
查看完整题目与答案
相关题目：
【简答题】我国采用国家标准或先进标准的方式通常有 、 、和 。
查看完整题目与答案
【单选题】通常，我国在国家标准管理办法中规定国家标准实施(11)内要进行复审。
A.
3年
B.
5年
C.
8年
D.
10年
查看完整题目与答案
【单选题】在下图中,与查询设计器的筛选标签中所设置的筛选功能相同的表达式是( )。
A.
选修表.成绩>=80 AND 选修表.成绩=<90
B.
选修表.成绩>80 AND 选修表.成绩<90
C.
80<=选修表.成绩 <=90
D.
80
查看完整题目与答案
【单选题】图示有源二端电阻网络 A 外接电阻 R 为 12 W 时, I = 2 A ; R 短路时, I = 5 A 。 则当 R 为 24 W 时 I 为( )。
A.
4A
B.
2.5A
C.
1.25A
D.
1A
查看完整题目与答案
【单选题】铁路运输的一批零担货物的件数不得超过（）
A.
200件
B.
300件
C.
400件
D.
500件
查看完整题目与答案
【简答题】观察与探究： 某礼堂共有25排座位，第一排有20个座位，后面每一排比前一排多1个座位，写出第25排的座位数．在以上其他条件不变的情况下，请探究下列问题 （1）当后面每一排都比前一排多2个座位时，写出第n排的座位数； （2）当后面每一排都比前一排多3个座位时，4个座位时，分别写出第n排的座位数； （3）某剧院共有P排座位，第一排有a个座位，后面每一排多b个座位，试写出第n排的座位数．
查看完整题目与答案
【判断题】“孙儿”写成拼音时,要加隔音符号。
A.
正确
B.
错误
查看完整题目与答案
【单选题】铁路运输,一批零担货物的件数不得超过( )。
A.
200件
B.
300件
C.
400件
D.
500件
查看完整题目与答案
【单选题】听力：What does the man say about Chinese?
A.
Q: What does the man say about Chinese? W: Hi, Leo. Why do you say English will become the world language? M: Well, for one thing, it's so commonly used. The only language that is used by more people is Chinese. W: Why is English spoken by so many people? M: It's spoken in many countries of the world because of the British Empire. And now, of course, there's influence of America as well. W: Many students find English a difficult language to learn. M: Oh, all languages are difficult to learn. But English does have two great advantages. W: What are they? M: Well, first of all, it has a very international vocabulary. It has many German, Dutch, French, Spanish and Italian words in it. So speakers of those languages will find many familiar words in English. In fact, English has words from many other languages as well. W: Why is that? M: Well, partly because English speakers have travelled a lot. They bring back words with them, so English really does have an international vocabulary. W: And what's the other advantage of English? M: It's that English grammar is really quite easy. For example, it doesn't have dozens of different endings for its nouns, adjectives and verbs, not like Latin, Russian, and German for example. W: Why is that? M: Well, it's quite interesting actually. It's because of the French. When the French ruled England, French was the official language and only the common people spoke English. They try to make the language as simple as possible, so they made the grammar easier. A.It is more difficult to learn than English.
B.
It is used by more people than English.
C.
It will be as commonly used as English.
D.
It will eventually become a world language.
查看完整题目与答案
【单选题】某礼堂共有25排座位,后一排比前一排多两个座位,最后一排有70个座位,问礼堂共有( )个座位第十七课时
A.
1152
B.
1150
C.
2300
D.
2302
查看完整题目与答案
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