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
1，三條肆意直線，L1和L2的交點(diǎn)的個(gè)數(shù)與L2和L3的交點(diǎn)的個(gè)數(shù)沒關(guān)。
2. The number of 1/4-inch lengths in 1
a 4-inch length
2，是問4英尺中有若干好多個(gè)1/4英尺，應(yīng)該是16個(gè)，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邊長(zhǎng)為1的立方體里最多能放下幾個(gè)邊長(zhǎng)為1/2的立方體，當(dāng)然是8個(gè)咯
4. Cube C has volume 8 cubic centimeters
The area of one of the faces of cube C 3 square centimeters
4立方體體積是8，那一個(gè)面的面積當(dāng)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應(yīng)該是-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