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【简答题】
函数 f(x)= 1 3 a x 3 + 1 2 a x 2 -2ax+2a+1 的图象经过四个象限，则实数a的取值范围是（　　） A． a＞- 3 16 B． - 6 5 ＜a＜- 3 16 C． a＞- 6 5 D． - 6 5 ≤a≤- 3 16
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皮皮学刷刷变学霸
举一反三
【单选题】在程序中,最常见的变量类型有()。
A.
数值型、字符型和逻辑型
B.
数值型、逻辑型和布尔型
C.
整数型、实数型和字符型
D.
实数型、整数型和布尔型
查看完整题目与答案
【单选题】On the pole side of the trade wind belt，there is an area of high pressure with weak pressure gradients and light，variable winds．This area is called the ______．
A.
Prevailing westerlies
B.
Geostrophic winds
C.
Doldrums
D.
Horse latitudes
查看完整题目与答案
【单选题】近年来,大气污染问题逐渐受到社会的关注,很多社会组织和个人呼吁政府加强污染治理力度,倡导绿色环保出行,根据莱恩.多亚尔和伊恩.高夫的需要理论,这种行为反映出的“中介需要”是( )。 (2015)
A.
重要的初级关系
B.
适当的教育环境
C.
自然环境的安全
D.
良好的社会环境
查看完整题目与答案
【判断题】It is avoidable for authoritative people to protect their rightness in some area of life. Many of the challenges they are faced with should be neglected in a way.()
A.
正确
B.
错误
查看完整题目与答案
【单选题】某疾病经济负担研究拟测量某地所有精神分裂症病人门诊治疗所形成的直接疾病经济负担，在计算精神分裂症病人总数时最好选用的指标是( )。
A.
患病率
B.
发病率
C.
就诊率
D.
住院率
查看完整题目与答案
【单选题】In some area, wind power has been successfully _____, creating an alternative method of producing energy.
A.
skipped
B.
tapped
C.
dragged
D.
choked
查看完整题目与答案
【单选题】In the Northern Hemisphere，an area of counterclockwise wind circulation surrounded by higher pressure is a ().
A.
Low
B.
High
C.
Warm front
D.
Cold front
查看完整题目与答案
【单选题】在程序中，变量有3种最常见的类型：数值型、字符型和__________。
A.
整型
B.
逻辑型
C.
字母型
D.
浮点型
查看完整题目与答案
【单选题】Some necessary equipment as well as food and clothes________sent to the disasterhit area since the powerful earthquake occurred. [     ]
A.
has been
B.
have been
C.
is being
D.
are being
查看完整题目与答案
【单选题】Some physicists have proposed that sunspots and solar wind have negligible effects on the earth's weather.
A.
undetermined
B.
insignificant
C.
unusual
D.
indisputable
查看完整题目与答案
相关题目：
【单选题】在程序中,最常见的变量类型有()。
A.
数值型、字符型和逻辑型
B.
数值型、逻辑型和布尔型
C.
整数型、实数型和字符型
D.
实数型、整数型和布尔型
查看完整题目与答案
【单选题】On the pole side of the trade wind belt，there is an area of high pressure with weak pressure gradients and light，variable winds．This area is called the ______．
A.
Prevailing westerlies
B.
Geostrophic winds
C.
Doldrums
D.
Horse latitudes
查看完整题目与答案
【单选题】近年来,大气污染问题逐渐受到社会的关注,很多社会组织和个人呼吁政府加强污染治理力度,倡导绿色环保出行,根据莱恩.多亚尔和伊恩.高夫的需要理论,这种行为反映出的“中介需要”是( )。 (2015)
A.
重要的初级关系
B.
适当的教育环境
C.
自然环境的安全
D.
良好的社会环境
查看完整题目与答案
【判断题】It is avoidable for authoritative people to protect their rightness in some area of life. Many of the challenges they are faced with should be neglected in a way.()
A.
正确
B.
错误
查看完整题目与答案
【单选题】某疾病经济负担研究拟测量某地所有精神分裂症病人门诊治疗所形成的直接疾病经济负担，在计算精神分裂症病人总数时最好选用的指标是( )。
A.
患病率
B.
发病率
C.
就诊率
D.
住院率
查看完整题目与答案
【单选题】In some area, wind power has been successfully _____, creating an alternative method of producing energy.
A.
skipped
B.
tapped
C.
dragged
D.
choked
查看完整题目与答案
【单选题】In the Northern Hemisphere，an area of counterclockwise wind circulation surrounded by higher pressure is a ().
A.
Low
B.
High
C.
Warm front
D.
Cold front
查看完整题目与答案
【单选题】在程序中，变量有3种最常见的类型：数值型、字符型和__________。
A.
整型
B.
逻辑型
C.
字母型
D.
浮点型
查看完整题目与答案
【单选题】Some necessary equipment as well as food and clothes________sent to the disasterhit area since the powerful earthquake occurred. [     ]
A.
has been
B.
have been
C.
is being
D.
are being
查看完整题目与答案
【单选题】Some physicists have proposed that sunspots and solar wind have negligible effects on the earth's weather.
A.
undetermined
B.
insignificant
C.
unusual
D.
indisputable
查看完整题目与答案