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下列关于勘察设计的发包与承包，说法不正确的是（）。

A、建设工程勘察、设计方案评标，应当以投标人的业绩、信誉和勘察、设计人员的能力以及勘察、设计方案的优劣为依据，进行综合评定

B、建设工程勘察、设计的招标人应当在评标委员会推荐的候选方案中确定中标方案

C、包括建设工程主体部分的勘察、设计在内，只要经发包方书面同意，承包方可以将建设工程其他部分的勘察、设计再分包给其他具有相应资质等级的建设工程勘察、设计单位

D、发包方可以将整个建设工程的勘察、设计发包给一个勘察、设计单位；也可以将建设工程的勘察、设计分别发包给几个勘察、设计单位

世界上海洋和陆地的比例是（　　）

A．

B．

C．三分陆地七分海洋

D．各占

下列变异中，属于染色体结构变异的是[ ]

A．果蝇Ⅱ号染色体上的某一片段移接到Ⅲ号染色体上

B．镰刀型细胞贫血症

C．杂交水稻的培育

D．交叉互换

Elephants are famous for their supposedly excellent memory. Now it seems that they are good at simple math too.

Researchers at the University of Tokyo have found an Asian elephant named Ashya can add small quantities together and correctly identify(识别）which is larger.

For example ,when researcher Naoko dropped three apples into one bucket and one apple into a second, then four more apples into the first and five into the second, Ashya correctly identified that the first bucket contained more apples and began munching(嚼）on her tasty prize.

Ashya chose the correct bucket 74% of the time "I even get confused when "I'm dropping the apple," Naoko told New Scientist magazine.

Elephants' counting abilities are far from unique. Chimps, pigeons(鸽子)and dolphins have shown the same abilities in lab tests, but what is more impressive for Elephants is that their ability to tell between two figures does not get worse when those numbers are more similar.

The elephants that Naoko tested were as good at telling the difference between five and six as they were at telling between five and one.

Naoko presented her findings last week at the International Society annual meeting in New York.

It is not obvious why elephants should need this mathematical ability in the wild." It is really tough to figure out why elephants would need to count," said Mya, a professor at Cornell University who studies elephants.

One possibility is that they use it to keep track of other members of their herd(兽群）so that no one is left behind. Asian elephants live in groups of six to eight." You really don't want to lose your group members," said Mya.

Another possibility is that the ability for simple math might be a by-product(副产品）of natural selection for a larger brain.

68.The experiments researchers have done recently show that elephants can____.

A. memorize things correctly      B. munch on apples

C. do some simple math          D. change small quantities into larger ones

69.What does the underlined word" tough" in Paragraph 8 mean?

A. Difficult        B. Impossible     C. Easy      D. Useful

70.The reason why elephants need to count is possibly that_____.

A. they want to exercise their brains

B .they often count the members of their herd

C. they hope to stay in groups

D. they have taken regular training

导致心脏性猝死最常见的疾病是

A．Q—T间期延长综合征
B．原发性扩张型心肌病
C．风湿性心脏病
D．冠心病