Cryptic (隐蔽的，隐藏的) species—animals that appear identical but are genetically quite distant—may be much more widespread than previously thought. The findings could have major implications in areas ranging from biodiversity (生物多样性) estimates and wildlife management, to our understanding of infectious diseases and evolution.
Reports of cryptic species have increased dramatically over the past two decades with the advent of relatively inexpensive DNA (脱氧核糖核酸) sequencing technology. Markus Pfenninger and Klaus Schwenk, of the Goethe-Universitat in Frankfurt, Germany, analyzed all known data on cryptic animal species and discovered that they are found in equal proportions throughout all major branches of the animal kingdom and occur in equal numbers in all biogeographical (生物地理学的) regions.
Scientists had previously speculated that cryptic species were
A. identified only one mosquito species instead of six species
B. thought only three mosquito species transmitted disease
C. thought there was only one mosquito species
D. did not know what species was being studied
| In every cultivated language
there are two great classes of words which, taken together, comprises the whole
vocabulary. First, there are those words (1) which we become
acquainted in daily conversation, which we (2) , that is to
say, from the (3) of our own family and from our familiar
associates, and (4) we should know and use (5)
we could not read or write. They (6) the common
things of life, and are the stock in trade of all who (7) the
language. Such words may be called "popular", since they belong to the people
(8) and are not the exclusive (9) of a
limited class. On the other hand, our language (10) a multitude of words which are compara A. tips B. mouth C. lips D. tongue [单项选择]良性肿瘤的生长方式多为（）
A. 外生性或膨胀性生长 B. 浸润性生长 C. 二者均有 D. 二者均无 [单项选择]化疗患者考虑停药的白细胞计数为（）。
A. 1.0×109/L B. 2.0×109/L C. 3.0×109/L D. 4.0×109/L E. 5.0×109/L [单项选择]《九十五条论纲》的作者是谁？（）
A. 马丁·路德 B. 加尔文 C. 闵采尔 D. 亨利八世 [单项选择]从冬至春及夏的气温变化，说明阴阳之间的关系为（）。
A. 对立制约 B. 互根互用 C. 消长平衡 D. 相互转化 E. 以上均非 [单项选择]3月19日，国家统计局首次发布我国（）发展指数，该指数以2005年为基期计算，2013年达到137.6，平均每年提高4个点，发展成效明显。
A. 单向经济 B. 复合经济 C. 循环经济 D. 绿色经济 [填空题]根据电力工程造价管理的特点,( )是确定新增固定资产的依据。
[判断题]《北京局集团公司铁路旅客电子客票实施细则》规定：铁路电子客票是以电子数据形式体现的铁路旅客运输合同的凭证。
A.正确 B.错误 [单项选择]为完成某项特定工作所必须具备的知识、技能、能力以及其他一些个性特征的目录清单被称为( )
A. 职位分类 B. 工作规范 C. 职位说明 D. 工作说明 [单项选择]船籍港船舶登记机关应当对船舶所有权登记申请进行审查核实；对符合规定的，应当自收到申请之日起（）日内向船舶所有人颁发船舶所有权登记证书。
A. 3 B. 5 C. 7 D. 15 [多选题]徒手防卫技术中，综合防护技术有（）。
A.格挡 B.搂抓 C.提膝 D.闪躲 [单项选择]根据人力资源管理规则，各部门经理的降职由人力资源管理部门提出申请，核定权限属于（）
A. 总经理 B. 副总经理 C. 人力资源管理部 D. 董事长 [单项选择]血液不完全双循环的动物是（）。
A. 园口纲 B. 鱼纲 C. 两栖纲 D. 鸟纲 E. 哺乳纲 [单项选择]
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[单项选择]合伙企业从法律上讲，属人合性质。现黄某、赵某和何某共同设立一合伙企业，则该企业自何时起方视为成立：
A. 合伙人协商一致 B. 三人订立书面合伙协议 C. 三人按照协议履行了出资义务时 D. 工商登记注册并签发营业执照 我来回答: 提交
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