单项选择题What does balk mean in the third paragraph
单项选择题Which of the following statements is TRUE of Frisen [A] He was encouraged by his parents to do research on stem-cells. [B] He founded a company on drug research in Karolinska. [C] He was considered the best person on stem-cells research. [D] After graduation, he did what he had intended to do.
单项选择题In 1964-1966, major resource of natural gas were discovered in the British sector of ______.
单项选择题According to Wade Henderson, the US Supreme Court [A] once helped maintain apartheid in Michigan. [B] was against racism and racial segregation. [C] states its position on preferential treatment. [D] is going to rule on two new cases of segregation.
填空题collecting and analyzing