按照显示方式分，LCD通常可分为（）。A.字段式 B.共阳式 C.共阴式 D.点阵式

下列选项中没有语病的一项是 (   ）

A．面对复杂多变的国际形势，中俄两国要密切在国际事务中的协调配合，坚决履行两国共同战略安全，促进世界和平、稳定、繁荣。

B．六部委联合举办的“中华赞”诗词征集活动，将围绕春节、清明、端午、中秋四个传统节日为主题征集原创性的诗词。

C．借助原版的影响力，中国版“舞林争霸”在舞蹈圈“一呼百应”，中国舞蹈家协会还专门为它下发了“红头文件”，请各舞蹈团配合舞者的选拔工作。

D．社区服务中心为孩子们准备了跳绳、羽毛球、拼图、棋类、卡拉OK等19项体育活动，并将20万元活动经费发动到各社区。

生活中处处有化学．我们的日常生活与化学有着密切的联系，请用①食盐②石墨③纯碱④食醋⑤酒精饮料⑥生石灰⑦熟石灰的序号填空．

（1）厨房调味品中pH小于7的是______；

（2）有用来制作“2B”铅笔的是______；

（3）汽车驾驶员驾车前禁止饮用的是______；

（4）为了防止某些食品受潮，在其包装袋中放入一袋干燥剂（标有“请勿食用”的警语），这种干燥剂是______．

直肠息肉病人的大便，常为（）

A、水样便

B、冻状便

C、脓血便

D、鲜血便

E、柏油样便

Holidays are special times of (1) from work and other routines. Holidays are often times for celebration, (2) , eating, drinking, travel, and family (3) . In most cultures the scheduling of holidays originally was related to the (4) , the (5) cycle, and (6) . Christmas, December 25, celebrates the (7) of Jesus, but it is not actually known whether Jesus was (8) in the wintertime Over the years Christmas has come to symbolize goodwill and (9) for both Christians and non-Christians, and the (10) of Christmas threatens to replace generosity with greed. Other important holidays in America are Valentine’s Day, St. Patrick’s Day, April Fools’ Day, and (11) . On Valentine’s Day, people give cards, chocolates, flowers, and kisses to their (12) and sweethearts. During Easter Week in late March or early April, Christians remember the death and (13) of Jesus. Although not actually a holiday and has no religious (14) , April Fools’ Day, celebrated on April 1, is a day when people play embarrassing (15) on their fiends and (16) and even on their teachers. In (17) , Labor Day is celebrated on May 1, whereas in (18) and the United States, labor and laborers are honored by a (19) holiday on the first (20) in September.

Holidays are special times of (1) from work and other routines. Holidays are often times for celebration, (2) , eating, drinking, travel, and family (3) . In most cultures the scheduling of holidays originally was related to the (4) , the (5) cycle, and (6) . Christmas, December 25, celebrates the (7) of Jesus, but it is not actually known whether Jesus was (8) in the wintertime Over the years Christmas has come to symbolize goodwill and (9) for both Christians and non-Christians, and the (10) of Christmas threatens to replace generosity with greed. Other important holidays in America are Valentine’s Day, St. Patrick’s Day, April Fools’ Day, and (11) . On Valentine’s Day, people give cards, chocolates, flowers, and kisses to their (12) and sweethearts. During Easter Week in late March or early April, Christians remember the death and (13) of Jesus. Although not actually a holiday and has no religious (14) , April Fools’ Day, celebrated on April 1, is a day when people play embarrassing (15) on their fiends and (16) and even on their teachers. In (17) , Labor Day is celebrated on May 1, whereas in (18) and the United States, labor and laborers are honored by a (19) holiday on the first (20) in September.

煤与瓦斯突出按动力现象的成因和特征分为哪几种类型？