题目内容
Fish taste better if they_____ without bright sunlight. Put your drying table under the tree for best results.
A. dry up B. hold up C. dry out D. hold out
C
阳光课堂同步练习系列答案
If you are looking for an animal to take the title of “most violent fish in the sea”, then the tiger puffer (河豚) fish would have to be a strong contestant. Not only is it deadly poisonous --- though that doesn’t stop people trying to eat it --- but it is also able to scare off enemies by inflating itself to become much larger than normal, when it is young it even chews on its own brothers and sisters.
Tiger puffer fish attach their eggs to rocks near the bottom of the sea, often at the mouths of bays. Then the larvae (幼鱼) move to the entries of rivers and lakes once they have grown a little. Then, having put on a lot of weight, they head out to sea. There’s no innocent childhood for the puffer fish, as Shin Oikawa of Kyushu University in Japan and his colleagues found out when they put the larvae of tiger puffer fish in the lab and monitored them for two months. They found that the larvae went through three steps in which their metabolic(新陈代谢) rates increased dramatically when they reached body weights of 0.002g, 0.01g, and 0.1g. When a larva went through one of these steps, its behavior also changed. For instance, once a larva had passed the first level it would have grown its first tooth and could start attacking larvae that had not yet reached that stage. Similarly, any larva that had reached the 0.01g or 0.1g levels would start attacking lighter larvae.
The researchers noted that the baby fish had a “relatively small mouth”, so rather than swallowing their brothers and sisters whole, they would bite pieces out of them. Despite this limitation, the fish caused plenty of deaths --- up to 12 per cent of the deaths that happened in the lab each day.
Those fish that grew fast enough to be able to chew on their fellows had an advantage. The extra food accelerated their growth and development. Tiger puffer fish are likely to be faster and swifter, so they can deal better with enemies.
As the name suggests, puffer fish can inflate to make themselves seem much larger than they really are, thus scaring off enemies. They do this by filling their stomachs, which are extremely elastic(弹性的), with water. If that’s not enough of a threat, the tiger puffer fish --- like most of the other puffer fish in the family --- carries a deadly toxin(毒素). Eat one puffer fish and the poison will paralyze (瘫痪) your muscles, including the muscles responsible for breathing, so death is usually caused by a lack of oxygen. Famously, the fish is a delicacy in Japan, where highly qualified chefs produce dishes that contain the safe level of the poison. Interestingly, the puffer fish does not go to the trouble of producing the poison itself. Instead, it hosts bacteria (细菌) that produce the stuff. It obtains these bacteria from its diet, so the youngest adult fish are not poisonous.
【小题1】All of the following statements account for the violence of puffer fish except that_____.
| A．they are very difficult to catch |
| B．they can become larger to threaten enemies away |
| C．they kill their younger companions as they grow up |
| D．they are deadly poisonous |
| A．can only grow to a weight of 0.1g |
| B．do not change their behavior as they grow up |
| C．like to find a safe place to hatch the next generation |
| D．begin to grow teeth when they reach the third level |
| A．Its inner organs. | B．The air it breathes in. |
| C．The diet it eats. | D．The bacteria around it. |
| A．Puffer fish can only produce poison when they face danger. |
| B．People like eating puffer fish even though they are poisonous. |
| C．The larvae are more aggressive than adult puffer fish. |
| D．Young puffer fish taste better than adult puffer fish. |
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
To dry fish, you will need either a drying table or a place to hang them. If a table is used, it should have a top made of wire screen or thin pieces of wood with space between each piece.
【小题1】Do not let them touch each other. Be sure that air can flow around the fish from all sides, including the top and bottom.
Build a small smoky fire under the drying table for the first day to keep the flies away. After that, you can keep the flies away by covering the fish with a thin cloth. 【小题2】
Fish taste better if they are out of bright sunlight while they are being dried. 【小题3】 Turn the fish over every other day. Small fish will dry in about three days if the air is dry. 【小题4】
After the fish have dried, place them in a basket. 【小题5】 Then put the basket in a cool, dry place off the ground.
Make sure as much of the saltwater as possible is removed before you smoke the fish.
| A．For best results, put the drying table under a tree. |
| B．Cover them with clean paper or large leaves. |
| C．Lay the cleaned and salted fish, still wet, on the table. |
| D．Wood from fruit trees makes good fuel for your fire. |
F. Dried fish must be kept completely dry until they are eaten.
G. Large fish will take a week or ten days to dry.
Fish taste better if they off the bright sunlight. Put you drying table under the tree for best results.
|
A．fade out |
B．turn out |
C．dry out |
D．give out |