| After flexing its mechanical arm and
finding some puzzling chemistry in a patch of Martian soil,the robotic rover
Spirit began investigating the composition of a rock named Adirondack yesterday
with two science instruments and a microscopic camera. Following programmed instructions from flight controllers, the six-wheel rover made several short turns and moved forward about six feet. It stopped within inches of the pyramid-shaped rock, about the size of a football. It was the vehicle’s second maneuver on the Martian surface since landing there on Jan. 3. Scientists at the Jet Propulsion Laboratory in Pasadena, Calif., said they did not expect results of the first rock examination until early today. But they were already both pleased and puzzled over the soil test results. "We’re starting to put together a picture of A. a kind of volcanic soil containing lava and mineral rock B. a kind of volcanic rock with its main content of lava and magnesium C. a kind of rock mainly consisting of oxygen, iron and magnesium D. a kind of oxygen with iron and magnesium [单选题] 以下防止脉动的措施错误的是( )
A. 提高工作压力 B. 增加加热段与蒸发段阻力的比值 C. 降低质量流速 D. 蒸发区段安装中间集箱 [多选题]目前，我国饭店可利用的预订网络主要有( )。
A.全球分销系统 B.地方预订营销系统 C.中央预订系统 D.旅游目的地营销系统 E.互联网分销系统 [判断题]柴油发动机工作中一旦发现机油压力过低,应及时停车,检查油底壳有无漏油,机油量是否符合要求等。( )
A.正确 B.错误 [单项选择]DS3200最多有几个接口？（）
A. 3 个 SAS 接口 B. 4 个 SAS 接口 C. 5 个 SAS 接口 D. 6 个 SAS 接口 [判断题]788. ( )可锻铸铁常用来铸造结构复杂的小型和厚壁零件。
A.正确 B.错误 [单项选择]在下列抗菌药物中，对肾脏损伤最小的是：（）
A. 氨基糖成类 B. 头孢他定 C. 多粘菌素 D. 两性霉素B E. 红霉素 [单项选择]在丘陵、山区林业播种飞行时速度在200千米/小时以上的航空器距地面障碍物不得少于（）。
A. 300 B. 200 C. 100 D. 150 [单项选择]( )是社会主义职业道德规范体系的核心。
A. 爱岗敬业 B. 诚实守信 C. 奉献社会 D. 为人民服务 [单选题]互联互通在我国首先体现在公用网络与()之间的互联。
A.公安网 B.万维网 C.互联网 D.专用网 [简答题]根据《信息安规》，需停电更换主机设备或存储设备的内部板卡等配件的工作，断开外部电源连接线后，可不做防静电措施。
[单选题]睡眠中枢位于【单选题】
A.大脑皮质 B.脑干尾端 C.上行抑制系统 D.蝶鞍区 E.第三脑室 我来回答: 提交
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