中国建设创新型国家，关键在于（） A.资金投入 B.吸引归国科技人员 C.自主创新能

图中，甲图示意世界某国主要城市分布，乙图示意我国某省级行政区主要城镇分布。读图回答下面小题。

关于图中城市（镇）分布及主要原因，下列叙述正确的是    

A．甲图中城市主要分布在平原，因为平原地区地形平坦

B．乙图中城镇主要分布在河谷，因为河谷地区水运便利

C．甲图中城市主要分布在高原，因为高原地区光照充足

D．乙图中城镇主要分布在河谷，因为河谷地区热量充足

CANBERRA(Reuters)—Australia’s kangaroos are genetically similar to humans and may have first evolved in China, Australian researchers said Tuesday.

Scientists said they had for the first time mapped the genetic code of the Australian marsupials(有袋类)and found much of it was similar to the genome for humans, the government backed Center of Excellence for Kangaroo Genomics said.

“There are a few differences, we have a few more of this, a few less of that, but they are the same genes and a lot of them are in the same order,”center Director Jenny Graves told reporters in Melbourne.

“We thought they’d be completely scrambled, but they’re not. There is great chunks of the human genome which is sitting right there in the kangaroo genome,” Graves said, according to AAP.

Humans and knagaroos last shared an ancestor at least 150 million years ago, the researchers found, while mice and humans separated and went in different ways from one another only 70 million years ago.

Kangaroos first evolved in China, but migrated across the America to Australia and Antarctica, they said.

“Kangaroos are hugely informative about what we were like 150 million years ago,” Graves said.

68.Where does the kangaroo first develop according the scientists?

A.In China.    B.In America. C.In Australia.       D.In Antarctica.

69.What does the passage mainly tell us?

A.How the Kangaroo first evolved.      B.Kangaroo’ genetic code have been mapped.

C.Kangaroos’genes are close to humans’.     D.Scientists did much research into Kangaroos.

70.What does the underlined word “scrambled” probably mean in the fourth paragraph?

A.Funny. B.Wrong.       C.Curious.      D.Right.

零基预算的特点是按计划决定预算、按预算计算成本、按成本分析效益、按效益衡量业绩。

与外源化学物发生可逆结合的血浆蛋白主要是（）

A.白蛋白

B.α1球蛋白

C.α2球蛋白

D.β球蛋白

E.γ球蛋白

癌基因表达的酪氨酸蛋白激酶主要是催化

A．特异性酶蛋白酪氨酸残基磷酸化
B．特异性酶蛋白丝氨酸残基磷酸化
C．特异性酶蛋白苏氨酸残基磷酸化
D．特异性组蛋白磷酸化
E．任一氨基酸磷酸化