What might be the cause of the bats' collisions?（ ）
What might be the cause of the bats' collisions?（ ）
What might be the cause of the bats' collisions?( ). A: Reflected light. B: Reflected sound. C: Toxic suroundings. D: Not mentioned.
What might be the cause of the bats' collisions?( ). A: Reflected light. B: Reflected sound. C: Toxic suroundings. D: Not mentioned.
What is the result of talking on a cellphone while driving（） A: It causes collisions of cars. B: It increases the risk of road accidents. C: It causes passengers’ complaints. D: It leads to slowness of drivers’ attention.
What is the result of talking on a cellphone while driving（） A: It causes collisions of cars. B: It increases the risk of road accidents. C: It causes passengers’ complaints. D: It leads to slowness of drivers’ attention.
____, where extensive work, particularly to ship’s structure may be repaired. These are results of groundings, collisions and other accidents. A: Voyage repairs B: Routine docking C: Damage repairs D: Annual repairs
____, where extensive work, particularly to ship’s structure may be repaired. These are results of groundings, collisions and other accidents. A: Voyage repairs B: Routine docking C: Damage repairs D: Annual repairs
In<br/>the previous question, by what factor doesthe<br/>rate of collisions of molecules with walls, () A: a<br/>factor of 9, B: a<br/>factor of 3, C: a<br/>factor of √3, D: a<br/>factor of 1, E: a<br/>factor of 1/3
In<br/>the previous question, by what factor doesthe<br/>rate of collisions of molecules with walls, () A: a<br/>factor of 9, B: a<br/>factor of 3, C: a<br/>factor of √3, D: a<br/>factor of 1, E: a<br/>factor of 1/3
Fill in the blank with the words given in the brackets. Change the form where necessary.（satellite；automate；vapor；in the air；expansion；hazard；take control of；magnetic；bunch ；vibrate）Traffic control establishes a set of rules and instructions that drivers, pilots, train engineers, and ship captain rely on to avoid collisions and other ________ .
Fill in the blank with the words given in the brackets. Change the form where necessary.（satellite；automate；vapor；in the air；expansion；hazard；take control of；magnetic；bunch ；vibrate）Traffic control establishes a set of rules and instructions that drivers, pilots, train engineers, and ship captain rely on to avoid collisions and other ________ .
请将下列段落翻译成汉语：Air traffic control (ATC) is a service provided by ground-based controllers who direct aircraft on the ground and in the air. The primary purpose of ATC systems worldwide is to separate aircraft to prevent collisions, to organize and expedite the flow of traffic, and to provide information and other support for pilots when able.
请将下列段落翻译成汉语：Air traffic control (ATC) is a service provided by ground-based controllers who direct aircraft on the ground and in the air. The primary purpose of ATC systems worldwide is to separate aircraft to prevent collisions, to organize and expedite the flow of traffic, and to provide information and other support for pilots when able.
中国大学MOOC: Look at the title, subtitle, source, picture and notes of the news article introduced in task 1. Predict again what the article might be about.Scientists aim to keep whales from the being biggest losers in sailboat racesNew guidelines could help prevent often-deadly collisions with boats Washington Post, July 10, 2017 http://edu-image.nosdn.127.net/C91BDB222320BBD9E7FAB68FE574EF34.jpg?imageView&thumbnail=890x0&quality=100Two humpback whales crest next to a sailboat off the coast of Cape Cod, Massachusetts, in 2010. Collisions between racing sailboats and whales are often deadly for the animals, so scientists and racing groups are working together to reduce the chance of collisions. (Heidi Hansen/Whale and Dolphin Conservation via AP)Question: The news article might be about ____.
中国大学MOOC: Look at the title, subtitle, source, picture and notes of the news article introduced in task 1. Predict again what the article might be about.Scientists aim to keep whales from the being biggest losers in sailboat racesNew guidelines could help prevent often-deadly collisions with boats Washington Post, July 10, 2017 http://edu-image.nosdn.127.net/C91BDB222320BBD9E7FAB68FE574EF34.jpg?imageView&thumbnail=890x0&quality=100Two humpback whales crest next to a sailboat off the coast of Cape Cod, Massachusetts, in 2010. Collisions between racing sailboats and whales are often deadly for the animals, so scientists and racing groups are working together to reduce the chance of collisions. (Heidi Hansen/Whale and Dolphin Conservation via AP)Question: The news article might be about ____.