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【单选题】
The manager introduced the rules that she would like to see _______ the next year.
A.
establish
B.
establishing
C.
established
D.
to establish
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【单选题】In America, every student in his or her second year of high school is required to take a class in driver's education. The course is divided up into two parts: class time for learning laws and regulati...
A.
is considered as part of the advanced education
B.
is given to anyone wanting to get a driver's license
C.
is carried on after students graduate from high school
D.
is offered to all the students of Grade 2 in high school
【单选题】Passage Five In America, every student in his or her second year of high school is required to take a class in driver's education. The course is divided up into two parts: class time for learning laws...
A.
is considered as part of the advanced education
B.
is given to anyone wanting to get a driver's license
C.
is carried on after students graduate from high school
D.
is offered to all the students of Grade 2 in high school
【单选题】设在直角坐标系{O;i,j,k}下,向量a=i+2j-3k,则向量a在向量i上的射影(投影)向量为( )。
A.
1
B.
i
C.
2j
D.
-3k
【多选题】风险的不确定性是指
A.
风险何时发生不确定
B.
风险发生的原因不确定
C.
风险发生后的损失不确定
D.
风险是否发生不确定
【单选题】设在直角坐标系{O;i,j,k}下,向量a=i+2j-3k,则向量a在向量i上的射影(投影)为( )。
A.
1
B.
i
C.
2
D.
-3
【简答题】a student who is in his or her first year at a high school or college
【简答题】设 e 1 , e 2 为单位向量.且 e 1 、 e 2 的夹角为 π 3 ,若 a = e 1 +3 e 2 , b =2 e 1 ,则向量 a 在 b 方向上的射影为______.
【简答题】改错:Three passions have governed my lifeThree passions have governed my life: the longing for love, the search into knowledge, and the unbearable __1__pity for the suffering of mankind.I have sought of...
【单选题】A student buries his/her head reading in a library or doing researches in a laboratory all day long may turn out to be nobody but a book nerd. Likewise, a student only cares about wandering around the...
A.
举例论证
B.
对比论证
C.
因果论证
D.
类比论证
【单选题】在坐标平面上直线l的方向向量 e =(- 4 5 , 3 5 ) ,点O(0,0),A(1,-2)在l上的正射影分别为O 1 、A 1 ,设 O 1 A 1 =λ e ,则实数λ=(  )
A.
2
B.
-2
C.
11 5
D.
- 11 5
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