Cоmprensión аuditivа: Yаsmine y Risha sоn estudiantes de biоlogía. Están estudiando en Argentina y ven con mucha frecuencia al hermano de Risha, quien trabaja en Buenos Aires. De vez en cuando, hacen juntas un videoblog corto para sus amigos. 10 de julio: Se alquila un departamento en Argentina. Yasmine Risha Shutterstock tinka’s /Shutterstock Intrucciones: Escucha lo que dice Risha y, luego, contesta las preguntas. La idea principal de lo que dice Richa es:
Whаt is the theоreticаl оxygen demаnd оf 115 mg/L benzene (C6H6) ? Atomic weights: C:12 O:16 H:1
A bicycle shоp mаintаins infоrmаtiоn about bicycles it has in stock. A bicycle is represented by the following Bicycle class. public class Bicycle { /** Returns the type of bicycle (for example, "road" or "mountain") */ public String getType() { /* implementation not shown */ } /** Returns true if the bicycle is assembled and returns false otherwise */ public boolean isAssembled() { /* implementation not shown */ } // There may be instance variables, constructors, and methods that are not shown. } Information about the inventory of bicycles at the shop is stored in a BicycleInventory class, which contains a list of the bicycles in stock at the shop. You will write two methods of the BicycleInventory class. public class BicycleInventory { /** A list of the bicycles the shop has in stock * Guaranteed to contain at least one Bicycle and all entries are non-null */ private ArrayList bicycleList; /** Returns an array of bicycles, as described in part (a) * Precondition: n > 0 */ public Bicycle[] getChoices(int n, String type, boolean assembled) { /* to be implemented in part (a) */ } /** Returns a randomly selected bicycle, as described in part (b) * Precondition: n > 0 */ public Bicycle chooseOne(int n, String type, boolean assembled) { /* to be implemented in part (b) */ } // There may be instance variables, constructors, and methods that are not shown. } (a) Write the BicycleInventory method getChoices. The method returns an array of at most n bicycles from those in stock where the bicycle type is equal to the type parameter and the bicycle assembly status is equal to the assembled parameter. If fewer than n bicycles meet the criteria, the unused array elements should be null. For example, assume that classicBike has been declared as a BicycleInventory object and bike1, bike2, bike3, bike4, and bike5 are properly declared and initialized Bicycle objects. The following table represents the contents of bicycleList. Bicycle Object Bicycle Type Bicycle Is Assembled bike1 "road" true bike2 "mountain" false bike3 "road" false bike4 "road" true bike5 "mountain" false The following table shows the results of several calls to the getChoices method. Method Call Return Value classicBike.getChoices(2, "mountain", false) {bike2, bike5} or {bike5, bike2} classicBike.getChoices(3, "road", false) {bike3, null, null} classicBike.getChoices(1, "road", true) {bike1} or {bike4} Note that the bicycles can be in any order in the array, but the null values must always be at the end of the array. Write method getChoices. /** Returns an array of bicycles, as described in part (a) * Precondition: n > 0 */ public Bicycle[] getChoices(int n, String type, boolean assembled)