3-1。What is the function of intelligent inks in food package？（ ）
A: detecting oxygen
B: detecting toxicity
C: detecting water
A: detecting oxygen
B: detecting toxicity
C: detecting water
A
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举一反三
- Such chemicals are indeed negatively ________ those humans to whom they are exposed. A: risking B: detecting C: impacting D: overwhelming
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- The word “radar” is an acronym for _______ A: Radio Detecting and Ranging B: Radio Defect and Reach C: Radio Defending and Range D: Radio Detect and Range
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内容
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1. Which is responsible for detecting the changes in muscle length and speed? A: (A) motor neurons B: (B) muscle fibers C: (C) muscle spindle D: (D) primary sensory cortex
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2、What do basic human need contain? A: Clean drinking water,food and shelter. B: Purified drinking water,food and shelter. C: Purified drinking water,food and an education. D: Clean drinking water,food and an education.
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What are the problems Mark need to address when he regains his consciousness and finds he is left alone on Mars? A: Water and food supply B: Where to get oxygen C: How to get power D: How to move around
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What are the Gods looking for? A: A place to stay B: Some water C: Some food D: A good person
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Water __________ oxygen (氧) and hydrogen (氢).