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China launched its Wentian space laboratory on Sunday, July 24, 2022,sending the country’s largest-ever spacecraft to Earth’s orbit to become part of the Tiangong space station.

Appearance

Wentian laboratory module (问天实验舱) has three parts: working cabin, airlock cabin and service module. With a length of 17.9 meters and a takeoff weight of 23 tonnes, the diameter is 4.2m. The height is almost like a six-story building and the weight of ten cars.

External working equipment

The lab will carry a set of 5-meter-long auxiliary robotic arms (辅助机械臂) outside the airlock, they are small but precise, making it easy for small and medium-sized devices to be caught for more delicate operations.

The “small arms” can also be connected with the core module’s “big arm” to form a 15 meters long composite arm (组合臂) for more work outside the module. By then, the arm will climb between the three modules of Tianhe. Tianwen and Mengtian, and the “mech warrior” (机甲战士) can control an even greater area.

Energy supply

Working together, the two giant solar panels (太阳能板) will collect more solar energy, generating electricity of more than 430 kwh on average per day, which can provide enough energy for space station operations.

Noise treatment

There are three sleeping areas and one sanitation area (卫生区). The module has got many equipments (设备). To provide a quiet environment, the engineers found out the nosiest equipment and they used stricter noise control methods. Different types of the noise, we can take different methods to control. For example, the noise caused by acoustic radiation (声辐射) are placed in the boxes. As a result, the noise level in the working area can be kept between 10-60 decibels (分贝), 10 being the lowest setting for the sleeping area, allowing the astronauts to sleep quietly.

Outside the module, cameras are set up to record Earth and outer space. Ground controller will see the site situation and provide real-time protection.

1．Find out the length, takeoff weight and diameter of the Wentian laboratory module.

A．179 m, 23 tonnes, 42m.	B．17.9 m, 23 tonnes, 42m.
C．17.9 m, 23 tonnes, 4.2m.	D．17.9 m, 2.3 tonnes, 4.2m.

2．What does “mech warrior” in paragraph 4 refer to ?

A．The “small arms”.	B．The core module’s “big arm”.
C．A 15 meters long composite arm.	D．A brave and strong space superman.

3．Which methods can make the Wentian laboratory module produce electricity?

A．With the help of noise.

B．By using auxiliary robotic arms.

C．The land controller will provide electricity.

D．Solar panels can collect some solar energy to generate electricity.

4．The paragraph 6 is mainly about _______.

A．The noise level in the sleeping area can be kept under 10 decibels.

B．Noise of some equipment won’t reduce the quality of astronauts’ sleep.

C．Engineers can’t solve the noise problem, so it influences the sleep quality.

D．The noise is controlled within a certain range, so astronauts can sleep peacefully.

5．This passage is from ______.

A．a guidebook

B．a science book

C．a culture book

D．an animal book