[填空题]Car theft is mainly caused by ______.

[填空题]Global warming is mainly caused by the release of pollutants into the atmosphere.

[判断题]The vapor problem was mainly caused by the chemical containments from the ground water out of the company.

[填空题]Wildfires are mainly caused by people, not by nature.

[填空题](S4) What did the author think mainly caused the traffic accident in this passage

[填空题]The sea level rise is mainly caused by______ triggered by unchecked greenhouse gas emissions.

[单项选择]Accidents caused by car doors being opened into the path of oncoming vehicles or cyclists are common in cities. But these incidents could become a thing of the past, if doors that react to potential impacts catch on.
……
The current prototype looks like a normal ear door, but an extra metal bar runs through its centre and connects to the ear’s flame between the hinges. In normal mode, the bar moves freely and doesn’t affect the door’s movement.
However, if sensors detect a nearby obstacle at the same time as an accelerometer (加速度讲; 加速仪) detects an attempt to open the door, the door’s swing is restricted by a linear motor attached to the bar.
The design of the intelligent door is designed in such a way that the door becomes hard to open when
A. there is an obstacle nearby.
B. there is something wrong with the accelerometer.
C. there is something wrong with the sensors.
D. there is an accelerometer in the car.

[填空题]A. Safe parking
B. Increase in car theft
C. Opportunities for non-professionals
D. Anti-theft organizations
E. divers’ carelessness: a factor in promoting ear stealing
F. car stealing mostly by professional criminals

Paragraph 1 ______.

[单项选择]Because car crashes are usually caused by human errors, it is always necessary to remind drivers of the following safety tips.
A. 因为车祸通常是人类错误所导致的，这就提醒我们有必要告知驾驶员下列安全提示。
B. 车祸通常是人为错误引起的，因此提醒驾驶员注意下列安全提示总是必要的。
C. 车祸通常是人类错误所导致的，提醒驾驶员注意下列安全提示总是有必要的。
D. 既然人类经常犯错误，也常出车祸，我们有必要注意驾驶员安全行驶的问题。
E. 既然人类经常犯错误，也常出车祸，驾驶员安全行驶问题就总是摆在我们面前。

[单项选择]A car mainly consists ______ a body, an engine, and four wheels.
A. with B. of C. in D. to