全国最大的煤炭能源基地是( )
A.山西 B.山东 C.黑龙江 D.河南
祖国统一是海峡两岸中国人的神圣使命,请排列下列相关活动的先后顺序
①台湾成立海峡交流基金会
②大陆成立海峡两岸关系协会
③汪辜会谈
④台湾当局开放居民赴大陆探亲
⑤邓小平提出“一国两制”的构想
A.④⑤①③② B.④⑤③②①
C.⑤④①②③ D.⑤④③①②
(2019·通辽)古诗文填空。
(1)夜阑卧听风吹雨, 。(陆游《十一月四日风雨大作》其二)
(2) ,决眦入归鸟。(杜甫《望岳》)
(3)此中有真意, 。(陶渊明《饮酒》其五)
(4) ,悠悠我心。(《诗经·郑风》)
(5)挥手自兹去, 。(李白《送友人》)
(6) ,八年风味徒思浙。(秋瑾《满江红》)
_______ good news! _______great information report he has given!
A. What; What a B. What; What C. How; What D. How; What a
天堂镇是美国著名的养老胜地,近年来吸引美国东北部地区的休闲、养老人口大量迁入。 2018年的一场森林大火将其焚毁。左图示意天堂镇的位置,右图为天堂镇气温年变化曲线和逐月降水量图。据此完成下面小题。
1 . 美国东北部人口大量迁入天堂镇,其自然原因主要是该地( )
A . 气候温暖,阳光充足 B . 地形平坦,出行方便
C . 管理完善,治安较好 D . 距海较近,交通便利
2 . 天堂镇附近最容易发生森林大火的季节是( )
A . 春季 B . 夏季 C . 秋季 D . 冬季
3 . 天堂镇附近的河谷地带盛产的水果可能是( )
A . 芒果 B . 香蕉 C . 菠萝 D . 葡萄
观察以下等式:
第 1 个等式: ,
第 2 个等式: ,
第 3 个等式: ,
第 4 个等式: ,
第 5 个等式: ,
⋯
按照以上规律,解决下列问题:
( 1 )写出第 6 个等式: ___ ;
( 2 )写出你猜想的第 n 个等式: ___ (用含 n 的等式表示).
一组按规律排列的代数式: , … ,则第
个式子是 ___________ .
阅读下面短文,从短文后备题所给的A、B、C、D四个选项中,选出可填入空白处的最佳选项。
The first astronauts
Since the earliest times, people have looked up at the stars, the moon and the planets. Today people use modern machines 16 at the sky. This is very different from the situation 17 years ago when people could only use their eyes. Perhaps they dreamed of 18 the universe.
When did humans first go into space? The story began not so very long ago, 19 the first astronauts were not people-they were animals.
Scientists wanted to make travelling to space as 20 as possible for humans. So they decided to experiment with animals and test 21 in spaceflights. Insects, mice, frogs, dogs and monkeys were some of the animals 22 first went into space. Many of them 23 , but they helped to make space travel safer for humans. For their great service, we 24 forget these animals.
Albert Ⅱ was the first monkey to go into space in 1949. Sadly he died 25 his spaceship landed back on Earth.
26 the result was different for Ham the Monkey. His story ended happily when he returned to earth 27 very good health.
Scientists wanted to know the answer to the important question: could 28 animal like Ham do the same things in space as he could do on Earth? The answer came when Ham 29 into space in 1961. Yes, he did everything well and lived for 30 16 years
16. A. look B. to look C. looking D. looked
17. A. thousand B. thousands C. thousand of D. thousands of
18. A. explore B. to explore C. explored D. exploring
19. A. as B. or C. but D. so
20. A. safe B. safer C. safest D. the safest
21. A. they B. them C. their D. theirs
22. A. whom B. what C. that D. whose
23. A. die B. died C. have died D. will die
24. A. shouldn’t B. may not C. don’t have to D. needn’t
25. A. if B. because C. after D. since
26. A. Luck B. Lucky C. Luckier D. Luckily
27. A. at B. on C. in D. for
28. A. a B. an C. the D. /
29. A. send B. sent C. is sent D. was sent
30. A. another B. other C. others D. the others
下列实例中,改变物体内能的途径与其他三个不同的是( )
A.用力搓手,手会发热
B.把冰冷的手放到嘴边哈气,手会变暖
C.用锯条锯木头,锯条温度升高
D.用手反复弯折铁丝,铁丝弯折处会发热
在利用酵母菌酿酒的过程中,从密封的发酵罐中检测到氧气、二氧化碳和酒精3种化学物质,其相对含量变化趋势如图,图中P.Q.R三曲线依次代表
A.氧气、酒精、二氧化碳 B.二氧化碳、酒精、氧气
C.氧气、二氧化碳、酒精 D.二氧化碳、氧气、酒精
已知 ,
,
,则
( )
A . B .
C .
D .
如图,平行四边形 ABCD 的顶点 B 在矩形 AEFC 的边 EF 上,点 B 与点 E , F 不重合,若 △ ACD 的面积 3 ,则图中阴影部分两个三角形的面积和为 ____________ .
如图,在 中,
,点 D 、 E 分别在
、
上,点 F 在
内.若四边形
是边长为 1 的正方形,则
________ .