一、阅读理解Butterflies are common all over the world, but butterflies in hotter countries are usually bigger and more brightly colored than those in cooler countries, and there are more different kinds.Usually the male butterflies are more brightly colored than the females. The females have bigger...
Butterflies are common all over the world, but butterflies in hotter countries are usually bigger and more brightly colored than those in cooler countries, and there are more different kinds. Usually the male(雄性的)butterflies are more brightly colored than the females. The females have bigger an...
When the butterflies are resting, their wings are closed, and these marks can't be seen. When a bird sees one, and begins to attack it, the butterfly will open its wings. The bird thinks that it sees two eyes staring at it, frightened, and flies away. (1) The female butterflies ...
Geoff Parker’s theory of sperm competition extended sexual selection theory to events occurring after copulation, with its male-centered focus on competition between sperm from different males for the fertilization of a set of eggs28. The equivalent female-centered theory, cryptic female choice ...
Although phylogenetically nested within the moths, butterflies have diverged extensively in a number of life history traits. Whereas moths rely greatly on chemical signals, visual advertisement is the hallmark of mate finding in butterflies. In the conte
Butterflies are common all over the world, but butterflies in hotter countries are usually bigger and more brightly colored than those in cooler countries, and there are more different kinds.Usually the male butterflies are more brightly colored than the females. The females have bigger and heavier...
根据“Butterflies are common all …the world.”可知,本题考查短语“遍布全世界”all over the world。故填(o)ver。 (2)题详解: 句意:雄性蝴蝶鲜艳的颜色可以帮助它们吸引雌性的蝴蝶。根据“The bright colours of the male butterflies can h… them attract (吸引) female (雌性的) butterflies.”可知,...
（9分）某硫酸厂周围的空气含有较多二氧化硫，为了测定空气中二氧化硫的体积分数做了如下实验： 取上述标准状况下的空气1L（内含N 2、O 2、SO 2、CO 2）慢慢通过足量氯水，然后在此溶液中加入过量的BaCl 2溶液，产生白色沉淀，将沉淀洗净、干燥后称重为0.466g。 （1）此空气中SO 2的体积分数为多少（写清楚...
Dragonflies eat flies, mosquitos, butterflies, and tadpoles. Dragonflies are mostly carnivorous! They are super-efficient when it comes to hunting prey. Dragonflies can launch aggressive attacks on tadpoles, worms, and other insect larvae in the water, even at their nymph stage. ...
2.How do butterflies hear sounds? A. Using their feet to sense the vibration of things B. Using their ears to listen directly C. Using their wings to sense the sound vibrations D. Using their antennae to judge the sound 3.Why do female adult butterflies carefully choose ...