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【单选题】
听力原文:M: What is your biology project about? W: It is about microorganisms that microorganisms that live by Chemosynthesis. M: Ehm what's Chemosynthesis? W: Well, it's pretty complicated. You know how most life on Earth depends either directly or indirectly on sunlight? M: You mean like plants get energy directly from sunlight, and animals eat plants, so they depend indirectly on sunlight? W: Right. But down on the ocean floor, there is no sunlight. In some places though, there are hydrothermal vents, which are small cracks on the sea floor. And these vents release heat and minerals from the inside of the Earth into the seawater. And all around the vents there are these unusual microorganisms. They are called archaea. And these archaea use chemical reactions to get their energy from the minerals, the minerals that are released by the vents. So their energy comes from chemical reactions, not sunlight. M: So ehemosynthesis is getting energy from chemicals? W: That is right. M: That makes archaea very different from other forms of life. W: And their genetic makeup is very different too. They are one sort of organisms just like bacteria are, but genetically they are as different from bacteria as we humans are. M: Waa, that's a really interesting project. What is the woman's project mainly about?
A.
How hydrothermal vents are formed.
B.
How living things get energy from sunlight.
C.
The harmful effects of certain chemicals in the ocean.
D.
Microorganisms that get energy from chemical reactions.
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【简答题】A. Fill in the blanks in the following sentences with the words listed in the box. Change the forms of these words if necessary. 注意:把每句话翻译成中文 作业书写格式,如: encirled 大卫在保镖的簇拥下走进了房间。 2. ... r estrict elbow...
【简答题】...the British shipping industry now began to feel the pinch.
【单选题】In our shipping industry, tide normally refers to the ( ) movement of the water.
A.
vertical
B.
flatter
C.
horizontal
D.
longitudinal
【单选题】水闸护坦的厚度应根据( )要求确定。
A.
抗滑和抗浮
B.
抗冲和抗浮
C.
抗冲和强度
D.
抗浮和强度
【简答题】标明100Ω16W和 100Ω25W的两个电阻串联时,允许流过的最大电流是( )A。
【单选题】关于青霉素G的描述不正确的是:
A.
抑制细胞壁粘肽合成
B.
杀菌剂
C.
对G-杆菌效果好
D.
可引起过敏反应
E.
对G+杆菌效果好
【单选题】动态规划法求解问题的基本步骤不包括( )。
A.
递归地定义最优值
B.
分析最优解的性质,并刻画其结构特征
C.
根据计算最优值时得到的信息,构造最优解(可以省去的)
D.
以自底向上的方式计算出最优值
【简答题】流动性比率是流动资产与每月支出的比值,反映客户支出能力的强弱,该比率通常保持在2左右。( )
【判断题】电压负反馈可以稳定输出电压。
A.
正确
B.
错误
【多选题】流动性比率的公式为( )
A.
现金及现金等价物/支出
B.
现金及现金等价物/每月支出
C.
流动性资产/支出
D.
流动性资产/每月支出
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