1. l1, l2 and l3 are three lines in space
The number of points at The number of points at
which lines l1 and l2 intersect which lines l2 and l3 intersect
1，三条肆意直线，L1和L2的交点的个数与L2和L3的交点的个数没关。
2. The number of 1/4-inch lengths in 1
a 4-inch length
2，是问4英尺中有若干好多个1/4英尺，应该是16个，所以A
3. The maximun number of solid cubes 4
having edges of length 1/2 meter that
can be placed inside a cubical box
having inside edges of length 1 meter
3边长为1的立方体里最多能放下几个边长为1/2的立方体，当然是8个咯
4. Cube C has volume 8 cubic centimeters
The area of one of the faces of cube C 3 square centimeters
4立方体体积是8，那一个面的面积当然是4咯
5. Ms.Smith got an 8 percent cost-of-living raise of $20 per week
Ms.Smith's new weekly salary $260
5 x*0.08=20，那x+20=270>260
6. On a certain number live, if -7 is a distance of 4 from n and 7 is a distance of 18
from n then n=
A.25 B.11 C.3 D.-3 E-11
6应该是-11
7. For all real numbers a and b. if a?b=a(a+b), then a?(a?b)=
A. a2+ab B a2+ab+a C a2+a+b D a3+a2b E a3+a2b+a2
注：a2暗示a平方，a3暗示a立方