According to the first paragraph, what happened to the waters off southern Greenland and Iceland in the last 30 years？
A. The waters are salty.
B. The waters are not very salty.
C. The salinity is decreasing.
D. The sea water is becoming less and less.
查看答案
What can we learn from the last two paragraphs？
A. Giving money and things to your children will ruin their lives.
B. Passing on an early inheritance can help offspring make good use of the money.
C. Giving one"s money can ensure his descends receive a better education.
Donors have no right to change the beneficiary once designated in the college savings plan.
It can be inferred from McKinsey research that
A. schools in poor areas have difficulty in attracting good teachers.
B. only around 1,500 top-third students choose to be teachers.
C. improving the students" performance may have positive effect on economy.
D. teachers in the US have lower prestige than those in other top-performing nations.
Which of the following is true according to the third paragraph？
A. The giant impact basins of the Caloris and that of the moon are all the same.
B. The giant impact basins of the Caloris are filled with dark lava to form. maria.
C. MESSENGER found a new patterning of impact basin in Mercury.
D. Solomon found natural drill holes in the surface of the moon.
Which of the following statements is true about increased intake of vitamin D？
A. It can"t help to reduce the risk of getting cancer.
B. It can control the expression of genes regulating cell division.
C. It has been recommended specifically for cancer prevention.
D. It is good to intake vitamin D as much as possible.
微信支付 
支付宝支付