Issue: an effective leader, highest ethical and moral standard.
Argu: People arrival on an island 7000 yrs ago, mammals 兵临灭绝在 3000yrs. 作者认为这个灭绝危机没有人为因素,是大气环境的改变导致的。他们发现了大量的鱼骨,但是没有mammals的骨头,所以认为不是人为因素。
Q
1.col A: 3.25 col B: 3(10^0)+2(10^-1)+5(10^-2) 选C
2.two circles. The difference in radius is 12. A. The difference in perimeters of two circle B. 72 Ans: A
3 X is multiple of 12 and Y is multiple of 15. XY is not the multiple of the following? (30, 36, 45, 72, 90) 选72, 因为它不能被180整除。
4 xy > 0, yz<0. Which of the following is negative? Ans: xz