剑桥雅思小作文|流程图范文
2017-09-28 15:06阅读：
题型6——Process Diagram（流程图）
Cambridge IELTS 6
TEST 3:
The diagrams below show the life cycle of the silkworm and the
stages in the production of silk cloth.
Summarise the information by selecting and reporting the main
features, and make comparisons where relevant.
The first diagram shows that there are four main stages in the life
of the silkworm. First of all, eggs are produced by the moth and it
takes ten days for each egg t
o become a silkworm larva that feeds on mulberry leaves. This stage
lasts for up to six weeks until the lava produces a cocoon of silk
thread around itself. After a period of about three weeks, the
adult moths eventually emerge from these cocoons and the life cycle
begins again.
The cocoons are the raw material used for the production of silk
cloth. Once selected, they are boiled in water and the threads can
be separated in the unwinding stage. Each thread is between 300 and
900 meters long, which means they can be twisted together, dyed and
then used to produce cloth in the weaving stage.
Overall, the diagrams show that the cocoon stage of the silkworm
can be used to produce silk cloth through a very simple
process.
Salmon begin life as eggs on a pebbly riverbed, hidden among reeds
in the slow-moving upper reaches of a river. After five to six
months the eggs hatch into “fry”. For approximately the next four
years, these baby salmon will live in the lower, faster-flowing
waters of their river. During this time they measure between three
and eight centimetres in length.
By the time salmon reach twelve to fifteen centimetres, they are
termed “smolt”, and at this time they migrate further downriver
into the open sea. After five years at sea the salmon will have
grown to adult size, which is between seventy and seventy-six
centimetres. They then begin swimming back to their birthplace,
where they will lay their eggs, and the cycle starts anew.
In summary, the salmon passes through three distinct physical
stages as it grows to maturity. Each of these stages takes place in
a very different aquatic location. It is noteworthy that the first
two stages of this fish‟s life occur in a freshwater environment,
while the third stage is lived in saltwater.
