【单选题】What can be inferred from the third paragraph?
A.
The fraternal twins are much more valued by researchers.
B.
Two kinds of twins are often been compared in research.
C.
Identical twins are more likely to be addicted to smoking.
D.
Fraternal twins are more genetically similar than identical twins.
【简答题】强度是指构件抵抗 的能力;刚度是指构件抵抗 的能力;稳定性是指构件维持其原有的 的能力。
【简答题】强度是指构件抵抗 的能力。刚度是指构件抵抗 的能力。
【单选题】Hay sees a trend towards more fraternal twins born to older woman.
【简答题】What do fraternal twins have in common in terms of genes?
【单选题】LUSTROUS : BURNISH ::
【简答题】Desertification in the arid United States is flagrant. Groundwater supplies beneath vast stretches of land are dropping precipitously. Whole river systems have dried up; others are chocked with sedime...
【简答题】强度是指构件抵抗 的能力;刚度是指构件抵抗 的能力;稳定是指构件维持其原有的 的能力。