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【简答题】
Listen to the recording and fill in the blanks with the words you hear. In the past, Brazilian family sizes were much ____1____ than today. In the 1990s, family size suddenly ____2____. What is ____3____ these changes? For years, many Brazilian families had four or more children. However, today, most Brazilian families have only one or two children. Thirty years ago, many Brazilians lived in small towns. Today, almost 85 percent of Brazil’s people live in cities. Life in a city can be___4___, so a small family is better. In the past, people ____5____ families in their early twenties. Today, many young men and women are going to school and getting a job first. They get ____6____ and have families ____7____ . In 1980, only about half of all homes had a television. Today, most homes have a TV, and evening shows called novelas are very ____8____ . The men and women on these shows are ____9____ or have small families. They have ____10____ lives. People watching want this life, too.
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【单选题】Cooling type includs air-cooled and .
A.
liquid-cooled
B.
coolant
C.
water
【简答题】上图是集中式(吸入式)单风管空调系统降温工况空气参数在湿空气焓湿图的变化过程,新风是状态点1,回风是状态点2,舱室是状态点7,如图空调器单位除湿量是____。A.d1-d2
【单选题】反应A+2B→3D的反应速率-dcA/dt等于
A.
-0.5dcD/dt
B.
-0.5 dcB/dt
C.
-2 dcB/dt
D.
-3 dcD/dt
【单选题】反应A+2B→3D的反应速率-dcA/dt等于( )
A.
-2 dcB/dt
B.
-3 dcD/dt
C.
-0.5dcD/dt
D.
-0.5 dcB/dt
【简答题】上图是集中式(吸入式)单风管空调系统降温工况空气参数在湿空气焓湿图的变化过程,新风是状态点1,回风是状态点2,舱室是状态点7,如图回风的含湿量与新风的含湿量相比_____。
【单选题】上图是集中式(吸入式)单风管空调系统降温工况空气参数在湿空气焓湿图的变化过程,新风是状态点1,回风是状态点2,舱室是状态点7,如图回风的含湿量与新风的含湿量相比_____。
A.
B.
C.
一样大小
D.
无法确定
【单选题】反应A+2B→3D的反应速率-dCA/dt等于( )
A.
-2dCB/dt
B.
-3dCD/dt
C.
-1/2dCD/dt
D.
-1/2dCB/dt
【单选题】“后”和“王”的称谓源自
A.
原始社会
B.
封建社会
C.
奴隶社会
D.
氏族公社
【多选题】市场上卖的猫咪有很多。下列哪些是我们在挑选猫咪时需要注意的问题?( )
A.
小猫是否有活力,动作是否灵活,鼻子是否微湿,呼吸是否顺畅无杂音;
B.
拥有亮而清澈的眼睛,干燥清洁的尾巴,健康的毛发、皮肤;
C.
适合自己饲养的颜色和性别;
D.
是否已喂服驱虫药,以及注射疫苗;
【单选题】“后”和“王”的称谓源自______。
A.
原始社会
B.
封建社会
C.
奴隶社会
D.
氏族社会
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