臭鼬的脚有多长

The cheetah (Acinonyx jubatus) is an atypical member of the cat family (Felidae) that is unique in its speed and stealth, while lacking climbing abilities. As such, it is placed in its own genus, Acinonyx. It is the fastest land animal, reaching speeds between 112 kilometres per hour (70 mph) and 120 kilometres per hour (75 mph) in short bursts covering distances up to 460 metres (1,500 ft), and has the ability to accelerate from 0 to 110 kilometres per hour (68 mph) in three seconds, greater than most supercars.
The cheetah's chest is deep and its waist is narrow. The coarse, short fur of the cheetah is tan with round black spots measuring from 2 centimetres (0.79 in) to 3 centimetres (1.2 in) across, affording it some camouflage while hunting. There are no spots on its white underside, but the tail has spots, which merge to form four to six dark rings at the end. The tail usually ends in a bushy white tuft. The cheetah has a small head with high-set eyes. Black "tear marks" run from the corner of its eyes down the sides of the nose to its mouth to keep sunlight out of its eyes and to aid in hunting and seeing long distances.
The adult cheetah weighs from 40 kilograms (88 lb) to 65 kilograms (140 lb). Its total body length is from 115 centimetres (45 in) to 135 centimetres (53 in), while the tail can measure up to 84 centimetres (33 in) in length. Males tend to be slightly larger than females and have slightly bigger heads, but there is not a great variation in cheetah sizes and it is difficult to tell males and females apart by appearance alone. Compared to a similarly-sized leopard, the cheetah is generally shorter-bodied, but is longer tailed and taller (it averages about 90 centimetres (35 in) tall) and so it appears more streamlined.
Some cheetahs also have a rare fur pattern mutation: cheetahs with larger, blotchy, merged spots are known as 'king cheetahs'. It was once thought to be a separate subspecies, but it is merely a mutation of the African cheetah. The 'king cheetah' has only been seen in the wild a handful of times, but it has been bred in captivity.
(The fastest sprinting speed is cheetah while the fastest running speed is a type of the antelope)

CD


A．正确，丁硫醇与甲硫醇及乙硫醇通式相同，官能团相同，结构相似互为同系物；
B．正确，丁硫醇的同分异构体有四种，沸点不同的丁硫醇有四种；
C．不正确，丁硫醇在空气中完全燃烧生成二氧化硫、二氧化碳和水，不能生成SO ₃
D．不正确，从结构上分析—SH上的氢原子比—OH上的氢原子易电离，氧吸电子能力更强。选C D。

you 第四声

D

丁硫醇与甲硫醇及乙硫醇都属于一元硫醇，分子结构相似都含有巯基，分子组成相差CH ₂ 的整数倍，A正确；丁硫醇同分异构体有四种，所以沸点不同的丁硫醇有四种，B正确；甲硫醇的分子式为CH ₃ SH结构中含有5个共价键，C错误；丁硫醇中含有碳元素、硫元素、氢元素所以燃烧产物是二氧化硫、二氧化碳和水，D错误；所以答案选CD，所给的参考答案有误。