more ... Symmetry is when one shape becomes exactly like another if you flip, slide or turn it. The simplest type of Symmetry is Reflection (or Mirror) Symmetry, as shown in this picture of my dog Flame. There is also Rotational Symmetry and Point Symmetry.
4. Steam the clams. Allow the clams enough time to open their shells-this will be indicated by a burst of steam and popped-open shells, anywhere from 2â3 minutes to 5-10 minutes, depending on the type of clams.If some don't open in this time, discard them as they probably were already dead.llow the clams enough time to open their shells-this will be indicated by a burst of steam and popped-open shells, anywhere from 2â3 minutes to 5-10 minutes, depending on the type of clams.
2Bring the water to a boil over high heat. Using tongs, pick up the crab, grasping it from behind and placing one arm of the tongs on the belly and the other on the back with the legs on either side. Place the crab back side up in the steamer rack. Cover and return the water to a full boil, about 1 minute. Reduce the heat to medium high and steam until the crab is cooked through, about 15 minutes more. 3Using tongs, remove the crab to a colander and rinse under cold water until cool enough to handle.