以下哪个不是希腊文明的发源地（）。A、奥林匹亚 B、克里特 C、古罗马 D、特洛伊

诊断浆细胞白血病的标准是（）

A.外周血中骨髓瘤细胞绝对值＞2×10⁹／L，分类＞20％

B.外周血中骨髓瘤细胞绝对值＞3×10⁹／L，分类＞10％

C.外周血中骨髓瘤细胞绝对值＞4×10⁹／L，分类＞20％

D.外周血中骨髓瘤细胞绝对值＞5×10⁹／L，分类＞10％

E.外周血中骨髓瘤细胞绝对值＞1×10⁹／L，分类＞10％

读“长江流域略图”及有关资料，回答下列问题．

材料一：你从雪山走来，春潮是你的风采；你向东海奔去，惊涛是你的气概．…（摘自《长江之歌》）

材料二：长江三峡水利枢纽工程计划2009年整体完工，完工后可控制荆江地区百年一遇的特大洪水；总装机量1820万千瓦，年发电量847亿千瓦/时，相当于10座大亚湾核电站；能改善宜昌至重庆的航道条件；能为长江中下游地区的城镇供水和农田灌溉用水提供保证．

（1）长江发源于______山脉，自西向东注入______海，是我国第一大河．

（2）长江素有“黄金水道”之称，水能主要集中在______河段，图中①是______

水利枢纽，它建成后将是世界最大的水利枢纽，具有巨大的综合效益，它发挥的综合效益体现在哪些方面？（任意写出两方面）______．

下列哪种方法可用来调整分析天平的零点（）。

A、调垫脚

B、调平衡陀

C、调零点微调梗

D、调左右吊耳

高温作业分级标准按照工作地点WBGT指数和高温作业时间将高温作业分为( )级，级别越高表示热强度越大。

A．2
B．3
C．4
D．5

Astronaut Jim Voss has enjoyed many memorable moments in his career, including three space flights and one space walk. But he recalls with special fondness a decidedly earthbound experience in the summer of 1980, when he participated in the NASA-AS-EE Summer Faculty Fellowship Program. Voss, then a science teacher at West Point, was assigned to the Marshall Space Flight Center’s propulsion lab in Alabama to analyze why a hydraulic fuel pump seal on the space shuttle was working so well when previous seals had failed. It was a seemingly tiny problem among the vast complexities of running the space program. Yet it was important to NASA because any crack in the seals could have led to destructive results for the astronauts who relied on them.

"I worked a bit with NASA engineers," says Voss, "but I did it mostly by analysis. I used a handheld calculator, not a computer, to do a thermodynamic analysis. "At the end of the summer, he, like the other NASA-ASEE fellows working at Marshall, summarized his findings in a formal presentation and detailed paper. It was a valuable moment for Voss because the ASEE program gave him added understanding of NASA, deepened his desire to fly in space, and intensified his application for astronaut status.

It was not an easy process. Voss was actually passed over when he first applied for the astronaut program in 1978. Over the next nine years he reapplied repeatedly, and was finally accepted in 1987. Since then he has participated in three space missions. The 50-year-old Army officer, who lives in Houston, is now in training for a four-month mission as a crew member on the International Space Station starting in July 2000.

Voss says the ASEE program is wonderful for all involved. "It brings in people from the academic world and gives NASA a special property for a particular period of time. It brings some fresh eyes and fresh ideas to NASA, and establishes link with our colleges and universities," Voss explains. "There’s an exchange of information and an exchange of perspectives that is very important."

For the academic side, Voss says, the ASEE program also "brings institutions of higher learning more insight into new technology. We give them an opportunity to work on real-world problems and take it back to the classroom. \

How many flights will Voss have finished if his four-month mission starting in July 2000 ends up successfully ？（）

A. Three

B. Two

C. Four

D. five