1.单选题- (共7题)
4.
如图,四棱锥S-ABCD的底面为正方形,SD⊥底面ABCD,则下列结论中不正确的是( )


A.AC⊥SB |
B.AB∥平面SCD |
C.SA与平面SBD所成的角等于SC与平面SBD所成的角 |
D.AB与SC所成的角等于DC与SA所成的角 |
2.选择题- (共5题)
8.
Whether one is happy or not depends less on money or on health than ______ on your ability to have fun.
Whether one is happy or not depends less on money or on health than ______ on your ability to have fun.
9.
Whether one is happy or not depends less on money or on health than ______ on your ability to have fun.
Whether one is happy or not depends less on money or on health than ______ on your ability to have fun.
3.填空题- (共3题)
15.
调查了某地若干户家庭的年收入x(单位:万元)和年饮食支出y(单位:万元),调查显示年收入x与年饮食支出y具有线性相关关系,并由调查数据得到y对x的回归直线方程:
=0.245x+0.321.由回归直线方程可知,家庭年收入每增加1万元,年饮食支出平均增加_______万元.

4.解答题- (共3题)
试卷分析
-
【1】题量占比
单选题:(7道)
选择题:(5道)
填空题:(3道)
解答题:(3道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:0
7星难题:0
8星难题:0
9星难题:13