Problem: Please answer a question about the following article about Gymnastics:
In the past, the floor exercise event was executed on the bare floor or mats such as wrestling mats. Today, the floor event occurs on a carpeted 12m × 12m square, usually consisting of hard foam over a layer of plywood, which is supported by springs or foam blocks generally called a "spring" floor. This provides a firm surface that provides extra bounce or spring when compressed, allowing gymnasts to achieve greater height and a softer landing after the composed skill. Gymnasts perform a choreographed routine up to 90 seconds in the floor exercise event; Depending on the level, they may choose their own, or, if known as a "compulsory gymnast," default music must be played. In some gymnastic associations such as United States Association of Gymnastic Clubs (USAIGC), gymnasts are allowed to have vocals in their music but at USA Gymnastics competitions a large deduction is taken from the score for having vocals in the music. The routine should consist of tumbling lines, series of jumps, leaps, dance elements, acrobatic skills, and turns, or piviots, on one foot. A gymnast can perform up to four tumbling lines that usually includes at least one flight element without hand support. Each level of gymnastics requires the athlete to perform a different number of tumbling passes. In level 7 in the United States, a gymnast is required to do 2–3, and in levels 8–10, at least 3–4 tumbling passes are required.
What was the floor exercise even on before?
A: the bare floor or mats such as wrestling mats
Problem: Please answer a question about the following article about Railway electrification system:
Central station electricity can often be generated with higher efficiency than a mobile engine/generator. While the efficiency of power plant generation and diesel locomotive generation are roughly the same in the nominal regime, diesel motors decrease in efficiency in non-nominal regimes at low power  while if an electric power plant needs to generate less power it will shut down its least efficient generators, thereby increasing efficiency. The electric train can save energy (as compared to diesel) by regenerative braking and by not needing to consume energy by idling as diesel locomotives do when stopped or coasting. However, electric rolling stock may run cooling blowers when stopped or coasting, thus consuming energy.
Which of two can be more efficiently electricified?
A: Central station
Problem: Please answer a question about the following article about Gamal Abdel Nasser:
During the presidential referendum in Egypt, Nasser was re-elected to a second term as UAR president and took his oath on 25 March 1965. He was the only candidate for the position, with virtually all of his political opponents forbidden by law from running for office, and his fellow party members reduced to mere followers. That same year, Nasser had the Muslim Brotherhood chief ideologue Sayyed Qutb imprisoned. Qutb was charged and found guilty by the court of plotting to assassinate Nasser, and was executed in 1966. Beginning in 1966, as Egypt's economy slowed and government debt became increasingly burdensome, Nasser began to ease state control over the private sector, encouraging state-owned bank loans to private business and introducing incentives to increase exports. During the 60's, the Egyptian economy went from sluggishness to the verge of collapse, the society became less free, and Nasser's appeal waned considerably.
What was Nasser's political opposition like in the 1965 election?
A: He was the only candidate
Problem: Please answer a question about the following article about Aspirated consonant:
Wu Chinese has a three-way distinction in stops and affricates: /p pʰ b/. In addition to aspirated and unaspirated consonants, there is a series of muddy consonants, like /b/. These are pronounced with slack or breathy voice: that is, they are weakly voiced. Muddy consonants as initial cause a syllable to be pronounced with low pitch or light (陽 yáng) tone.
What kind of voice are muddy consonants pronounced with?
A:
slack or breathy