... can therefore only occur in acid fresh water. There is a relationship between the CH and the general hardness: the closer the CH value comes to the GH value, the more bal- anced the water. If the ... is essentially the rear part of the body, particularly the caudal fin, which serves to propel the fish, while the other fins play a stabilizing and steer- ing role. Of...
Ngày tải lên: 26/01/2014, 18:20
Ngày tải lên: 23/12/2013, 12:17
Tài liệu The complete guide to the toefl ibt writing part 7 ppt
Ngày tải lên: 23/12/2013, 12:17
Tài liệu The official guide to the new toefl ibt part 7 pptx
Ngày tải lên: 21/01/2014, 07:20
The Complete Aquarium Guide - Part 3
... volitans The volitan lionfish is the one most often found in the aquarium trade. It gets accustomed to dead foodstuffs. The membrane linking the spokes of the pectoral fins runs to the rear end of their body, ... detect food. Their elongated body enables them to weave their way skilfully through natural obstacles in their path. Plotosus lineatus The young live in shoals where...
Ngày tải lên: 18/10/2013, 00:15
The Complete Aquarium Guide - Part 5
... accordance with the diagram below (if the filter is to be on the left of the aquarium), with the glass strips in pairs facing each other. They must not be more than 8 cm apart. The distance between the perforated ... pro- liferate, with the subsequent risk of suffo- cating their hosts, as the plants are prevented from exchanging gases and absorbing the salts in the water...
Ngày tải lên: 08/11/2013, 00:15
The Complete Aquarium Guide - Part 6
... light The further away the light source, the greater the loss in: - the lighting hood; - the glass lid covering the aquarium; - the water. Part of the light is reflected by the surface of the water, ... unnatural appearance, so they hide their diffusers and pipes in the decor, and the bubbles are only noticeable when they break the surface of the water. For th...
Ngày tải lên: 08/11/2013, 00:15
Tài liệu Bulding skill for the toefl ibt transcripts part 7 ppt
... building the Eiffel Tower for several reasons. They thought the tower would destroy Paris’s beautiful landscape. They considered the design to be like an ugly skeleton. They also thought the tower would ... class. The man offers suggestions to solve the problem. The problem the woman has is that she is bored and falls asleep in class. One thing that the man suggests is for...
Ngày tải lên: 24/12/2013, 02:16
Tài liệu Longman preparation series for the toeic test advanced part 7 pptx
Ngày tải lên: 24/12/2013, 11:17